Lower manhole, smoke vent, cold-blast inlet, transition pipe, telescoping pipeline, etc.

下部人孔、烟口、冷风口入口、转折管、变径管等。

youdao

Lower manhole, smoke vent, cold-blast inlet, transition pipe, telescoping pipeline, etc.

下部人孔、烟口、冷风口入口、转折管、变径管等。

youdao