Mud removing of settling ponds had a direct and important influence on their operation effect.

沉淀池的排泥对其运行效果有着直接、重要的影响。

youdao

Mud removing of settling ponds had a direct and important influence on their operation effect.

沉淀池的排泥对其运行效果有着直接、重要的影响。

youdao