樓主: Happy.Jin
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拋磚引玉,談螺紋及其加工。 |
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點(diǎn)評(píng)
任何機(jī)械加工產(chǎn)品的經(jīng)濟(jì)性,永遠(yuǎn)是要首先考慮的問題。
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點(diǎn)評(píng)
PT和G都是英制管螺紋,只不過PT是錐管螺紋,G是直管螺紋。
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