樓主: 齊魯大地
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老外設(shè)備螺栓上加以套管是什么意思----如圖,請(qǐng)教 |
回復(fù) 70# 巍峨的山峰 的帖子
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提個(gè)建議
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應(yīng)是加強(qiáng)強(qiáng)度吧
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