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Large-scale filter tanks with filter bed of - extended operating life
Large-scale filter tanks with filter bed of - extended operating life
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机译:带有滤床的大型滤池-延长使用寿命
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摘要
Tanks e.g. with filter beds of gravel, coke, sand etc in which the flow through the bed falls off after only the first few centimeters of the bed height have been used, incorporate the improvement whereby a bed-loosening apparatus is moved over the bed surface.
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