精螺紋級 的英文怎麼說
中文拼音 [jīngluówénjí]
精螺紋級
英文
coarse series thread-
Fasteners. tolerances for bolts, screws and nuts product grade f fine mechanic. thread diameters from 1 up to 3 mm
緊固件.級螺釘和螺帽公差精密機械.螺紋直徑1到3mm
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