15487| 20
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剛性攻絲和浮動(dòng)攻絲的區(qū)別 |
點(diǎn)評(píng)
攻絲后的螺距并不好。
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點(diǎn)評(píng)
這就是浮動(dòng)的優(yōu)點(diǎn)吧。
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點(diǎn)評(píng)
有道理。
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點(diǎn)評(píng)
贊成層主觀點(diǎn)。
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