发布时间:2025-01-31 23:29:37
胀好杯形口,母材插入深度,充氮,调整中性焰,加热,接近暗红色时,上磷铜焊条,将焊料熔化后流进缝隙,充满后,离火,降温后,停氮,OK,要多练习。祝你好运!
我是做消防的有一个问题解决不了工地上穿防火墙的风管需要做套管
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