多级精密过滤系统，溶液循环往复使用。
Multi-level precise filter system, Solvent repeated recycle use in the machine.
置换后草酸溶液循环使用，降低了成本。
The oxalic acid solution can be re-used through displacement for reducing the cost.
本文研究了溶液循环流动法生长大截面KDP晶体的工艺条件。
The growth of large KDP crystals is studied by solution circulating method.
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