The quality and result of chemical clean is determined by the various factors of the rinsed.

化学清洗的质量和效果，受被清洗对象各种因素的影响。

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This article introduces the purpose, method and procedure of HF acid chemical clean for once through boiler, and comparison between chemical clean of different mediums is presented as well.

重点介绍直流锅炉氢氟酸酸洗的目的，方法及过程，还对不同介质的化学清洗进行了比较。

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The experimental results show that the permeate was clear, and the content of metal ion was lower. The Membrane flux was larger and stable. Ceramic Membrane flux can be recovered by chemical clean.

实验结果表明，经陶瓷膜精滤后的溶液清晰、透明，有价金属杂质离子含量和含油量降低， 精滤后溶液的物理和化学指标可达到工业生产的标准。

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The City of Lincoln Council said a chemical-clean of the water system was taking longer than expected.

BBC: Lincolnshire

The city council said on Saturday that a chemical-clean of the water system was taking longer than the expected 36 hours, and that bottled drinking water and alternative bathing facilities were being provided.

BBC: Lincolnshire

Russia's failure to come fully clean about its chemical and biological programmes has led to delays in disbursing some Nunn-Lugar funds.

ECONOMIST: New challenges for Americans, Europeans and Russians