blow down

1.The telephone wires were blown down by the rainstorm.

电话线被暴风雨刮落了。

2.Backwashingable filter can blow down at any moment and backflush the filter without pumping off,which improves the application effect,reduces the cost and elongate the working life.

可反清洗器在不停泵的情况下随时排污和层进行反清洗作业,提了使效果,降低了使,延长了使寿命。