... pit-type carburizing furnace 坑式渗碳炉 pit-type electric furnace 坑式电炉 pitch ①螺距②齿节，节距，间距③硬沥青，沥青，木沥青④音调，高度，斜度，周节 ...
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pit type electric furnace 坑式电炉
vertical pit-type tempering electric furnace 井式回火电炉
electric pit-type heating furnace 井式电加热炉
large pit-type electric resistance furnace 大型井式电阻炉
pit-type temperting electric resistance furnace 井式回火电阻炉
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