7915| 7
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這兩種高強(qiáng)度螺栓的區(qū)別是什么? |
點(diǎn)評(píng)
能否告知什么手冊(cè),哪一頁?謝謝
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點(diǎn)評(píng)
后者:機(jī)械設(shè)計(jì)手冊(cè)單行本推薦的是M12到M30,鋼結(jié)構(gòu)用高強(qiáng)度螺栓
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