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關(guān)于螺紋旋和長(zhǎng)度標(biāo)準(zhǔn) |
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點(diǎn)評(píng)
自己實(shí)力不夠,誤會(huì)了大俠,請(qǐng)大俠諒解,同時(shí)也謝謝大俠指點(diǎn)
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