主要是高压水发生器、阀门管路配件、自动化控制水平较低，经验较少。
Is mainly the high-pressured water generator, the valve pipeline fitting, the automation control level is low, the experience are few.
所有这些固体污染物都可能堵塞细小的孔、空气管路、设备和阀门，也造成粉末涂装工件的污染。
All these solid pollutants may jam tiny hole, air lines, equipment and valve, also caused the pollution of powder coating workpieces.
往复泵启动前必须将排出管路中的阀门打开。
Reciprocating pump discharge pipe must be before the start of the valve to open.
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