The telephone wires were blown down by the rainstorm.

电话线被暴风雨刮落。

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.

清洗过滤器在不停泵的情况下时排污和对过滤层进行清洗业,高使用效果,降低使用成本,延长使用寿命。