解决了旧砂回用问题，具有显著的经济效益及社会效益。
It has solved the problem of reclamation of return sand, and it has remarkable economic as well as society benefits.
经实践证明：回用的金属砂能满足生产要求，降低了生产成本。
The practice shows that recycled metal sand filter can meet requirements of production and reduce production cost.
洗车废水回用成套设备，一种通过混凝沉淀，砂滤等过程来解决洗车废水循环的设备。
Disclosed is a complete equipment for waste water reuse. The device solves the recycling of car wash water through processes such as coagulating sedimentation and sand filtration.
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