发布时间:2025-01-19 16:31:45
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!
我想开一家五金店但是没有经验开五金电料方面的必须具备哪些条件
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