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美国标准直管螺纹
gen.
national standard straight pipe thread
avia.
American standard taper pipe thread
tech.
American Standard Straight Pipe Thread
美国标准
美制
直管螺纹
mech.eng.
American Standard straight pipe thread
(national pipe straight thread)
美国 标准 直管螺纹:
2 phrases
in 1 subject
Mechanic engineering
2
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