4390| 6
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這個(gè)英制螺紋如何標(biāo)注? |
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點(diǎn)評(píng)
謝謝賜教,萬(wàn)分感激!
評(píng)分
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點(diǎn)評(píng)
60度的,應(yīng)該是米國(guó)標(biāo)準(zhǔn)。
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