工艺：螺牙蒸汽锅炉式电热管是由加热管与螺牙法兰焊接，蒸汽锅炉绝缘电木固定而成。

Technology: flange type of heating is heating pipe and welding flanges from fixed.

youdao

工艺：螺牙蒸汽锅炉式电热管是由加热管与螺牙法兰焊接，蒸汽锅炉绝缘电木固定而成。

Technology: flange type of heating is heating pipe and welding flanges from fixed.

youdao