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3個(gè)厚的板攻M8的螺紋? |
點(diǎn)評
那叫翻包,再攻絲,鈑金上經(jīng)常用到,3個(gè)厚,成本可能比較高,不如點(diǎn)焊焊接螺母
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點(diǎn)評
偷奸耍滑,好多椅子柜子都這樣搞的,過不了幾年全散架了。
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