The candle type diatomite filter is most ideal.
过滤设备以烛式硅藻土过滤机为好。
It is possible that the filter-aids could be made from low grade diatomite and perlite;
认为低品位硅藻土和珍珠岩经过适当加工是可以制成合格助滤剂的；
It is possible that the filter-aids could be made from low grade diatomite and perlite;
认为低品位硅藻土和珍珠岩经过适当加工是可以制成合格助滤剂的；
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