过滤开始前要将硅藻土和洁净的油进行混合，这项工作由助滤层涂覆机进行。
Before the start of diatomite to filter and clean the oil mix, which help filter by coating machine.
本发明的方法省略了涂覆和除去防锈油的工序，提高了生产效率，节约了生产时间，降低了成本。
The method of the invention omits the working procedures of coating and antirust oil removal, improves the production efficiency, saves the production time, and reduces the cost.
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