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螺紋大徑小徑之間有關(guān)系嗎,? |
點(diǎn)評(píng)
了解
大哥,!前面一個(gè)是精確數(shù)字,車螺紋時(shí)用,。后面一個(gè)僅僅是畫(huà)螺孔時(shí)簡(jiǎn)便計(jì)算用,。
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