1549| 8
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請(qǐng)教多頭絲桿問題 |
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點(diǎn)評(píng)
螺距13也是非標(biāo)準(zhǔn)的
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點(diǎn)評(píng)
螺距6.5,也是非標(biāo)準(zhǔn)的。
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