发布时间:2025-01-31 23:37:45
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!
mpp电力电缆管的国家标准是什么 mpp电力电缆保护管检测标准是什么
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