介绍了利用霞普气制作的预热装置，实现了压缩机焊接机壳不需进炉就能预热的关键。
Preheating unit by using Xiapu gas is introduced, the key point that welding casing can be preheated without getting into furnace has been achieved.
介绍了利用霞普气制作的预热装置，实现了压缩机焊接机壳不需进炉就能预热的关键。
Preheating unit by using Xiapu gas is introduced, the key point that welding casing can be preheated without getting into furnace has been achieved.
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