Terms for subject Mechanics containing extra

English	Chinese
Dalmine extra extended performance	达耳明超强性能
extra heavy grade pipe	加重级钻杆【管子】
extra high tee	超高三通
extra improve plow steel	用于制作钢丝绳特别改性的高强犁钢
extra long wheel base	特长轮距
extra low-carbon	极低碳
extra super duralumin	超硬铝
American National Extra Fine Thread	美制标准极细牙螺纹
unified extra fine thread	统一特细螺纹