Sediment transport may not pump more water or mud. Flooding electric motor cavity should always clean up the sand, the replacement of electric water cavity.
电泵不得输送含沙量较多的水或泥浆。水浸电机应经常清理电机腔内的沙粒，更换电机腔内的清水。
2
Therefore, use of water source heat pump is clean and renewable energy as a technology.
所以说，水源热泵利用的是清洁的可再生能源的一种技术。
3
They imported sand and sectioned off a part of the ocean where they pumpcleanwater .