发布时间:2025-01-31 02:00:35
在斜坡楼顶做支架,支架的支腿不一样长,靠坡顶部短,靠坡下方长,支架顶部则保持水平就可以放水塔了。
线切割机床对丝的时候烧断了换上新丝以后走的实在太慢了而且火花很小这是怎么回事用旧丝干活的时
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