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Terms for subject Metallurgy containing lower | all forms | exact matches only
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alloy of low electrical resistance低电阻合金
blowing at low temperature低温吹炼
boundary level between upper and lower pools上部和下部钢水池界面 (复合钢板坯连铸的)
casting speed of super low head continuous caster超低头连铸机拉坯速度
cold-drawn low carbon steel wire冷拉低碳钢丝
cold-drawn low carbon steel wire冷拔低碳钢丝
cold-rolled extra low carbon steel sheet冷轧超低碳薄钢板
compound of lower valency低价化合物
critical low liquid steel level in tundish中间包钢水临界低液位 (【技】中间包内钢水在浇注过程中或在浇注末期的液面高度如果低于某一高度,钢水面就会产生旋涡,致使中间包内的渣子流人结晶器,直接影响连铸坯质量。此时的中间包内钢水面高度称之为中间包临界低液位。)
crown change at low pressure end【压】 低压端凸度变化
crystal of low symmetry低对称性晶体
deformation at low temperature低温变形
deformation of low temperature低温变形
degradation at low temperature reduction低温还原粉化 (率)
Demag-Humboldt low shaft process德马格-汉堡矮身炉炼铁法
Demag-Humboldt low-shaft process德马克-洪堡矮炉身炼铁法
Demag-Humboldt low shaft process德马克-洪堡矮身炉炼铁法
diffraction lines at low Bragg angle低布拉格角衍射线
disintegration at low temperature低温碎裂
disintegration at low temperature低温粉化
dislocation of lower energy低能位错
dislocation of lower energy低能位错
disproportionation of lower halide低价卤化物歧化
ductile cast iron pipe for carrying water at low pressure球墨铸铁低压水管
extra-low-carbon ferrochromium超低碳铬铁
extra-low carbon ferrochromium超低碳铬铁
extra-low-carbon interstitial-free steel超低碳无间隙原子钢
extra-low-carbon stainless steel超低碳不锈钢 (【技】通常指含碳量低于0.03%、具有避免晶间腐蚀能力的奥氏体不锈钢。对铁素体不锈钢而言,要避免晶间腐蚀就要求碳(或氮)含量必须低于0.01%。在一些情况下,不锈钢中加钛或铌固定钢中的碳,可减轻这种晶间腐蚀的敏感性。超低碳不锈钢可以采用氩氧脱碳精炼法或真空精炼脱碳法生产。)
extra-low carbon stainless steel超低碳不锈钢
extra-low-carbon steel超低碳钢
extra-low-carbon steel极低碳钢
extra-low carbon steel超低碳钢
extra-low-carbon steel wire超低碳钢丝
extra-low-interstitial隙式固溶元素极少的
fake, counterfeit and low grade commodities假冒伪劣商品
fibre gasket impregnated with low melting point sealing compound浸有低熔点化合物的纤维密封圈 (【技】用于钢包下水口和长水口结合处的密封,能有效防止空气吸人造成钢流二次氧化。)
filling at low stockline level【铁】低料线装料
fine grain low alloy steel细晶粒低合金钢
first lower punch第一下模冲
first lower punch第一下冲杆
flux with low crystallization temperature低结晶温度保护渣
flux with low melting point低熔点保护渣
Fröhling low-expansion mill弗罗林小弹性变形轧机
fully killed low alloy steel全脱氧低合金钢
hardening at low temperature低温硬化
high casting speed at low superheat低过热度快铸
high grade low alloy scrap优质低合金废料
high low control高低调节
high low limits高低限值
high low watt meter高低档瓦特表
high quality low phosphorus pig iron优质低磷生铁
high strength low alloy steel高强度低合金钢
high-speed continuous casting of ultra low carbon steel超低碳钢高速连铸
high-speed pouring at low temperature低温快注
high-strength, low-alloy高强度低合金
high-strength low-alloy steel高强度低合金钢 (【技】碳含量通常低于0. 25%,合金元素总量通常低于2.5%,可焊接屈服强度 ≥ 295MPa 的低碳、低合金工程结构用钢。)
hydraulic low clay gun液压矮泥炮
hydraulic low pressure station低压液压站
induction low-frequency furnace低频感应电炉
induction low-frequency furnace低频感应
Invar low expansion alloy因瓦低膨胀系数合金
Johanson's low-resistance trap约翰逊低阻抗捕汞器
leaded low-phosphorus steel含铅低磷易切削
leaded low-phosphorus steel含铅低磷钢
line of low intensity低强度线
low alloy低组分合金
low-alloy high strength steel低合金高强度钢
low-alloy high-strength steel低合金高强度钢
low-alloy high-strength structural steel低合金高强度结构钢
low-alloy iron casting低合金铸铁件
low-alloy steel低合金钢 (【技】合金元素含量较低的钢。在我国,通常将合金元素总含量 ≤5% 的钢称为低合金钢。低合金钢一般包括可焊接的低合金高强度结构钢、低合金耐候钢、低合金钢筋钢、铁道用低合金钢、矿用低合金钢等。)
low-alloy steel casting低合金钢铸造
low-alloy steel casting低合金铸钢件
low-alloy steel plate for boiler锅炉用低合金钢板
low-alloy steel wire低合金钢丝
low-alloy tool steel低合金工具钢
low-ash低灰分的
low-ash coke低灰分焦炭
low-ash coke低灰分焦
low-ash reducing material低灰分还原物料
low assay低含量
low assay低含量贵重组分试样
low-atomic-number低原子序数的
low-atomic-weight低原子量的
low-background低本底的
low baking低温烘烤 【焙】
low baking低温烘烤
low blast低风量
low-blast furnace常压高炉
low-blast furnace常压鼓风炉
low blast temperature blast furnace低风温高炉
low-blow brittle transition低能冲击脆断转变试验
low British thermal unit低热值
low-BTU fuel gas低发热值燃气
low-BTU fuel gas热值燃气
low casting rate stream低浇注速度注流
low casting speed caster低拉速连铸机
low-coercivity低矫顽磁力的
low crystallization temperature flux低结晶温度保护渣
low current低安培电流
low current arc小电流电弧
low density低密度
low-density alloy低密度合金
low-density charge低密度炉料
low-density cut低密度分选
low-density cut低密度分离
low-density gas低比重气体
low-density material低密度材料
low-density method低电流密度法
low-density powder细粉末
low-density powder低密度粉末
low-density process低密度法
low-density process低电流密度电解法
low-density scrap for steelmaking低密度炼钢用废钢铁
low-density sprayable lining of tundish中间包低密度喷涂衬
low-density sprayable tundish lining中间包低密度喷涂衬
low differential coke oven低压差式焦炉
low-differential oven低压差式焦炉
low distillation低温蒸馏
low ductile alloy低塑性合金
low ductility steel低延性钢
low ductility temperature range低延性温度区间
low-duty小功率的
low-duty低级的
low-duty轻载的
low-duty fireclay brick低级耐火粘土砖
low-early-strength cement早期低强水泥
low electrical resistance steel wire低电阻钢丝
low-energy dislocation低能位错
low-energy electron低能电子
low-energy electron diffraction低能电子绕射
low-energy electron diffraction低能电子衍射
low-energy ion source低能离子源
low-energy radiation软性辐射
low-energy side of energy gap能隙的低能范围
low-energy side of energy gap能隙的低能界限
low flow rate strand【连】低流量注流
low flow rate stream【连】低流量注流
low-gangue sinter低脉石烧结矿
low gold-content alloy低金合金
low-grade低级的
low-grade低品位的
low-grade antimony metal低品位金属
low-grade bauxite低品位铝土矿
low-grade concentrate低品位精矿
low-grade copper低级铜
low-grade copper低品位铜
low-grade deposit贫矿床
low-grade firebrick低级耐火砖
low-grade fluxed sinter低品位自熔性烧结矿
low-grade fuel低级燃料
low-grade gas热值煤气
low-grade heat低热值热量
low-grade hematite低品位赤铁矿
low-grade matte低品位冰铜
low-grade matte低品位锍
low-grade metal低品位金属
low-grade ore贫矿
low-grade ore低品位矿石
low-grade run-of-mine低品位原矿
low-impurity scrap steel低杂质废钢
low lance distance【钢】低枪位
low lance height【钢】低枪位
low-leaded brass低铅黄铜 (66Cu, 3. 5Zn,0.5Pb)
low-lift pump低压泵
low load blast【铁】慢风
low load blast furnace慢风操作高炉
low loader轻型装载机
low-magnesia stone低氧化镁熔剂
low-manganese低锰
low-manganese steel低锰钢
low melt【钢】 低碳炉次
low melt软熔
low melt低碳炉次
low-mesh coke粉焦
low-mesh coke碎焦
low-metal content ore低品位矿
low-metal content ore贫矿
low metal level低钢水位
low metal level低液位
low metal level低金属液位
low-MgO sinter低 MgO 烧结矿
low-moisture低水分
low-moisture coal低水分煤
low-moisture ore低水分矿石
low-moisture precipitate低水分沉淀物
low-moisture taphole mix低湿度堵出铁口泥
low-moisture taphole mix低湿度堵出铁口泥
low-moisture taphole mix低湿度炮泥
low moor低层湿源
low nitrogen steel低氮钢
low oscillation frequency, long oscillation stroke低振频大振幅
low oscillation frequency, short oscillation stroke低振频小振幅
low-output acetylene generator低产量乙炔发生器
low-phosphorous pig iron低磷生铁
low plastic clay低塑性粘土
low porosity低孔隙率
low porosity低空隙度
low porosity低孔隙度
low porosity graphite rod致密石墨棒
low porosity roof brick致密炉顶砖
low-power electric arc furnace小功率电弧炉
low-power micrograph低倍显微照片
low-power microscope低倍显微镜
low-power microscopic image低倍显微镜像
low-power microscopical image低倍显微镜像
low-power objective低放大率物镜
low-power objective低倍物镜
low-powered electric furnace小功率电炉
low-powered furnace小功率电炉
low-powered microscope低倍显微镜
low-pressure air atomization低压空气喷雾法
low-pressure blast低压鼓风
low-pressure boiler低压锅炉
low-pressure type burner低压燃烧器
low-pressure casting低压铸造 (法)
low-pressure casting低压铸造
low-pressure type cutter低压割炬
low-pressure type cutter低压切割器
low-pressure die-casting machine低压压铸机
low-pressure die•casting machine低压压铸机
low-pressure distillation低压蒸馏
low-pressure gas低压气体
low-pressure gauge低压表
low-pressure acetylene generator低压乙炔发生器
low-pressure laminar jet低压层流喷嘴
low-pressure melting低压熔化
low-pressure plasma spray低压等离子喷涂
low-pressure plasma spraying低压等离子喷涂
low-pressure pressing低压挤压
low-pressure pump低压泵
low-pressure welding torch低压
low-pressure Venturi with cone tank锥形槽低压喷管
low-pressure Venturi with cone tank锥形槽低压文丘里管
low-pressure water低压水
low-pressure water-cooling system低压水冷系统
low-pressure-cooling circuit低压水冷系统
low-purity低纯度
low-purity flux低纯度熔剂
low-rate trickling filter低负荷滴滤池
low reflecting coating弱反射镀层
low reflecting coating弱反射涂层
low-silicon bauxite低硅铝土矿
low-silicon bronze低硅青铜 (97.7Cu 1.5Si,余量 Zn)
low-silicon cast iron低硅铸铁
low-silicon ferrosilicon低硅硅铁
low-silicon hot metal低硅铁水
low-silicon operation低硅操作
low-silicon operation of BF高炉低硅操作
low-silicon pig iron低硅生铁
low-silicon pig iron practice低硅生铁生产实践
low-silicon pig iron process低硅生铁生产法 (【技】在控制高炉下部温度和造渣制度条件下冶炼含硅量不超过0.3% -0.4%生铁的生产工艺。高炉采用该生产工艺冶炼生铁具有提高产量、降低焦比和炼铁成本等优点。)
low-silicon pig iron process低硅生铁生产工艺
low-silicon practice低硅作业
low-silicon practice低硅生铁生产工艺
low-silicon steel低硅钢
low-sintered composite contact metal低温烧结复合电触头合金
low-sintering低温烧结
low-SiO₂ sinter低 SiO₂ 烧结矿
low-slag cement低矿渣水泥
low-speed agitator低速搅拌器
low-speed mill慢速轧机
low-speed mill低速轧机
low speed rolling低速轧制
low-speed X-ray film低速 X 射线胶片
low spitting lance低喷溅氧枪
low steel level in tundish中间包内低钢水位
low stockline炉料低料线
low sulfur pipeline steel低硫管线钢
low-symmetrical crystal低对称性晶体
low taper alarm锥度低限报警
low-tech product低技术产品
low tempering低温回火
low tensile alloy低强度合金
low tundish level中间包低液位
low tungsten high speed steel低钨高速钢 (1.5C, 1.03Mn, 0.86Si, 8.01Cr, 3.37V, 2.63W,1.29Al,0.09N)
low tungsten tool steel低钨工具钢
low velocity electron低速电子
low velocity forming method低速成形法 (薄板的)
low-viscosity oil低粘度油
low viscosity powder flux低黏度保护渣
low viscosity starter powder低黏度开浇用保护渣
low-volatile bituminous coal低挥发分烟煤
low-voltage arc低压电弧
low-voltage circuit低压电路
low-voltage distribution低压配电
low-voltage-bus system低压导电母线系统
low water低潮
low water低水
low water cut-off device锅炉低水位断流装置
low water-bearing formation弱含水层
low-water-loss cement低析水性水泥
low yield低产出率
low yield低产量
low yield alloy低屈服点合金
low yield point steel低屈服点钢 (【技】屈服点相对较低的钢。这种钢具有优良的深冲性能,容易变形加工制造形状复杂的制品。08 F 钢是典型的低屈服点钢。屈服点只有 176MPa 左右。用这种钢的薄板可制造深冲压和深拉延制品。)
low yield ratio steel低屈强比钢 (【技】即屈强比明显低于其他钢种的高强度合金钢。材料的屈强比即其屈服强度与拉伸强度之比,是衡量金属板材冲压性能的重要指标。一般要求非合金钢的屈强比不大于70%,低合金高强度钢的屈强比不大于80%,否则冲压性能较差,必须采取一定的工艺措施改善其冲压加工性。深冲用钢板的屈强比不大于66%。双相钢是典型的低屈强比钢。)
low-zirconium hafnium sponge低锆海绵铪
lower arm下电极臂
lower bainite下贝氏体 (【技】在贝氏体转变区间较低温度形成的贝氏体。其光学金相形态呈黑色针状,与回火马氏体相似。)
lower bainite下贝茵体
lower bell【铁】 大料钟
lower bell大料钟
lower bending roll下弯曲辊
lower blade下刀片 (剪切机的)
lower bosh line【铁】 炉腹底线
lower bosh line下炉腹线
lower bosh line炉腹底线
lower bound method下界限法
lower burner低燃烧器
lower burner【焦】 低灯头
lower chloride低价氯化物
lower circulating flow下环流 (钢水的一种流动形态)
lower consolute temperature下临界混溶共熔温度
lower contact下部电接头
lower contact下接头
lower control limit下部控制界限
lower coupler plate底板
lower critical field下临界磁场
lower critical point下临界点
lower critical temperature下临界温度
lower detector下探测器 (带钢 X 射线测厚仪的)
lower die阴模
lower die下【凹】模
lower die下模
lower die shoe下【凹】模座
lower electrode低电极
lower electrode底电极
lower-energy position低能位置
lower-energy state低能态
lower-energy state较低能态
lower falsework下部脚手架
lower frame下部框架
lower furnace casing下部炉壳
lower furnace shell下部炉壳
lower groove下轧槽
lower gun下电子枪
lower half of mold结晶器下半部分
lower halide低卤化物
lower hearth下炉膛
lower heat removal alarm limit散热报警下限
lower heat zone下加热段
lower heating value低发热值
lower heating zone下加热段
lower in wall【铁】 下部炉身
lower inwall下部炉身
lower knife clamp下刀压板
lower knife slide滑动下刀架
lower lance height降低枪位
lower layer底层
lower limit of grade品位下限
lower limit of heat removal alarm散热报警下限
lower linearity limit低线性极限
lower loop flow下环流 (钢水的一种流动形态)
lower looper下撑套器
lower looper下活套挑
lower looper driving shaft下撑套器驱动轴
lower looper driving shaft下活套挑驱动轴
lower looper holder下撑套器安装架
lower looper holder下活套挑安装架
lower lying electron低能级电子
lower lying electron能级较低的电子
lower melting alloy低熔点合金
lower nozzle下水口
lower oxide低价氧化物
lower oxide of manganese锰的低价氧化物 (However, the lower oxide of manganese (MnO) cannot be further reduced by CO or hydrogen at any of the temperatures that encountered in the stack. 然而,在炉身的任何温度下,锰的低价氧化物 (MnO) 都不可能被 CO 或氢进一步还原。)
lower part of mold结晶器下部
lower part of shell坯壳下部
lower pass下轧槽
lower plunger下模冲
lower plunger下冲杆
lower pool in mold结晶器下部钢水池 (【技】复合钢板坯连铸时,在结晶器下部形成的钢水池。)
lower portion of blast furnace高炉下部
lower portion of blast furnace高炉底部
lower portion of shell坯壳下部
lower preheat block下预热块
lower preheat zone下预热段
lower punch下模冲
lower punch下冲杆
lower punch pressure下冲头压力
lower ram下锤头
lower range value下限值
lower recirculation loop flow下环流 (钢水的一种流动形态)
lower red heat暗红色
lower-ring wall下围墙
lower-ring wall下部大墙 (热风炉的)
lower roll下轧辊
lower roll下辊
lower row of tuyeres下排风口 (Hot blast is blown into the shaft furnace through the lower row of tuyeres with basic oxygen furnace dust injected into it through the upper row of tuyeres. 热风通过下排风口鼓人竖炉内,氧气顶吹转炉炉尘通过上排风口喷人竖炉内。)
lower safety deck下部安全平台 (高炉大修用)
lower sample下部试样
lower sample底层试样
lower seal valve下密封阀 (无钟炉顶部件)
lower sealing valve下密封阀 (无钟炉顶部件)
lower separator下横梁
lower shoe下模座
lower side of cast product铸坯下面
lower side of strand铸坯下面
lower side of strand铸坯底面
lower sidewall section下段拦板
lower sidewall section【团】 下段拦板
lower sidewall section拦板下段
lower soak zone下均热段
lower soak zone下均热区
lower spray section二次冷却带下部
lower stack炉身下部
lower stack【铁】 下部炉身
lower stack下部炉身
lower stand下机架
lower striker下锤头
lower surface of continuously cast semifinished product连铸坯下表面
lower surface of strand连铸坯下表面
lower thickness limit in rolling最低可轧厚度
lower unbending roll下矫直辊
lower yield point下屈服点
lower yield stress下屈服应力
lower zone heating element下部加热元件
lowest energy electron最低能级电子
lubricant for low temperature service低温用润滑剂
material of low absorbing power低吸收能力材料
microscope of low magnification低放大率显微镜
microscope of low magnification低倍显微镜
nonoriented electrical steel with low carbon and low silicon低碳低硅无取向电工钢 (【技】电工钢的一大类。一般含 C 小于等于0.015%, Si (或Si+Al) 小于等于1%。钢板中晶粒呈无规则取向分布。产品为板材或带材。性能特点是饱和磁感应强度高,铁心损耗大;制造工艺简单,成本低,有良好的冲击和焊接性能。适于制做功率小的家用电机小变压器和整流器、继电器等。)
operation with low ore-column低料柱作业
operation with low ore-column低料柱操作
ordinary low-carbon steel普通低碳钢
pellet for ultra low slag volume超低渣量球团
pellet with low slag content低脉石球团
pellet with low slag content低渣量球团
phase of low crystal symmetry低结晶对称相
plasticity at low temperature低温塑性
pouring at low tundish level中间包低液位浇注
powder for continuous casting of ultra low carbon steel超低碳钢连铸用保护渣
powder with low melting point低熔点保护渣
primary lower punch第一下模冲
primary lower ram第一下压头
processing at low temperature低温加工
quality low-alloy high-strength steel优质低合金高强度钢
quality low-alloy steel优质低合金钢
quality low-alloy structural steel优质低合金结构钢
quality low-carbon ferromolybdenum优质低碳钼铁
quality low-carbon steel优质低碳钢
quality low-phosphorus cast iron优质低磷铸铁
quality low-phosphorus steel优质低磷钢
reduction degradation at low temperature【团】 低温还原粉化 (【技】即炼铁用烧结矿和球团矿在低温还原过程中发生碎裂粉化的现象,严重时会影响高炉上部料柱的透气性,破坏高炉炉况顺行。影响烧结矿和球团矿低温还原粉化的因素有:矿石种类、 Fe₂O₃ 的结晶形态、烧结矿碱度、还原温度及铁矿石中其他元素的含量。)
resulphurized low phosphorus steel加硫低磷钢
resulphurized low-phosphorus steel加硫低磷易切削
resulphurized rephosphorized low carbon steel加硫增磷低碳钢
rich low brass富铜低锌黄铜 (82 ~ 87Cu、余量 Zn)
Schmidt's low-resistance cut-off施密特低阻抗汞断流器
second lower punch第二下模冲
second lower punch第二下冲杆
secondary lower punch第二下模冲
secondary lower ram第二下压头
semi-low head machine半低架式机组
semi-low head machine立弯式连铸机
slab with very low oxide inclusion content氧化物夹杂含量极低的板坯
spheroidal graphitic cast iron pipe for carrying water at low pressure球墨铸铁低压水管
spheroidal graphitic cast iron pipe for carrying water at low pressure低压输水用球墨铸铁管
stationary lower punch固定下模冲
stationary lower punch固定下冲杆
steel for low-temperature service低温钢 (【技】适用于 -20°C 以下,甚至在-269° C 使用的钢种。低温钢除要求室温力学性能外,还必须具有良好的低温韧性。低温钢包括:低温高强度钢、2. 5%镍钢、3. 5%镍钢、5%镍钢、9%镍钢以及奥氏体不锈钢等。)
steel of low alloy content低合金钢
steel tapping at low temperature低温出钢
steel with low carbon content低碳钢
steel with low sensitivity to welding crack低焊接裂纹敏感钢
super low head continuous caster椭圆形连铸机 (【技】铸坯在连铸机内沿四分之一椭圆运动并沿其水平切线被拉出,从而使连铸机高度和钢水压头均大为降低,故称超低头连铸机。根据铸坯在连铸机内的运动轨迹,该种连铸机亦称椭圆形连铸机。超低头连铸机的主要优点是:钢水压头低,钢水静压小,鼓肚变形小,二次冷却区夹辊结构得以简化;水平布置,便于维修等。)
super low head continuous caster【连】超低头连铸机
super low head continuous caster mold超低头连铸机结晶器
super low head continuous casting超低头连铸
super low head continuous casting equipment超低头连铸设备
super low head continuous casting process超低头连铸法
super low head continuous casting technology超低头连铸技术
super low head continuous slab caster超低头板坯连铸机 (【技】该型连铸机是把小半径多点矫直的弧形连铸机和板坯连铸技术相结合的一种连铸机机型。由于起始半径(结晶器的圆弧半径和二冷区上段半径)小,连铸机总高度低,适宜于建设在高度低的厂房内。该机型与纯净钢水的生产技术相结合,能生产达到热送和直接轧制质量要求的无缺陷铸坯。该型连铸机的建设投资明显低于通常的弧形连铸机。)
super ultra low carbon steel超超低碳钢
tin-copper low-fuming bronze低焊接烟雾锡青铜
titanium-stabilized extra-low-carbon aluminium killed steel钛稳定化超低碳铝镇静钢
toughness at low temperature低温韧性
tundish operation at low level of steel中间包低液位操作
ultra-low-carbon IF steel超低碳无间隙原子钢
ultra-low-carbon interstitial-free steel超低碳无间隙原子钢
ultra-low-carbon nonoriented electrical steel超低碳无取向电工钢
ultra-low-carbon stainless steel超低碳不锈钢
ultra-low-carbon steel超低碳钢 (The slow cool and quench studies on mold fluxes for continuous casting of medium-carbon and ultralow-carbon steels are performed to know their layer structures. 对中碳钢和超低碳钢连铸用结晶器保护渣进行了缓冷和急冷研究,以便弄清它们的层状结构。)
ultra-low-carbon steel超低碳钢
ultra-low carbon steel strip for hidden cover超低碳荫罩钢带 (彩色显像管用)
ultra-low oxygen steel超低氧钢
ultra-low sulphur steel超低硫钢
upper/lower pool boundary level上部和下部钢水池界面 (复合钢板坯连铸的)
upper-and-lower simultaneous conditioning上下部调节
very low carbon stainless steel超低碳不锈钢
very low hydrogen steel极低氢量钢
very low nitrogen极低氮
very low nitrogen process超低氮炼钢法
very low nitrogen process微氮钢冶炼法在底吹转炉中吹入蒸汽和氧气
very low nitrogen process底吹蒸气氧气转炉 VLN 炼钢法
very low nitrogen process低氮钢冶炼法
very low nitrogen processVLN 炼钢法
very low nitrogen process极低含氮量炼钢法
very low nitrogen steel极低氮钢
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