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打樁用厚壁螺旋鋼管

打樁用厚壁螺旋鋼管

打樁用厚壁螺旋鋼管-埋弧焊的原理：埋弧焊是利用電弧熱能進行焊接的，與手工焊條電弧焊不同的是：埋弧焊的焊絲是裸露的，上面沒有涂料，埋弧焊的確焊劑是預先鋪在待焊處的，埋弧...

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