There were mainly shortcomings of condensate drainers on gas pipes due to using thermal insulation by steam.

煤气管道上的冷凝水排放器，传统上采用蒸汽保温，存在许多弊端。

youdao

There were mainly shortcomings of condensate drainers on gas pipes due to using thermal insulation by steam.

煤气管道上的冷凝水排放器，传统上采用蒸汽保温，存在许多弊端。

youdao