发布时间:2025-01-31 23:23:37
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!
卫生间pvc下水管遇下热水啪啪响声音很大手摸有震动感哪位有经验的师傅给出出主意头快要炸了
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