发布时间:2025-01-19 16:17:48
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!
装修时把强电箱移位到大门后承重墙上挖个浅洞约40x30深12厘米将电箱埋入物业发整改书怎么办
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