The chemical wash is pumped ahead of the cement slurry to help ensure effective mud removal and efficient cement placement.

化学冲洗剂在水泥浆之前泵入，以利于确保有效地去除泥浆和有效地放置水泥浆。

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There will also be a need for proper drainage facilities, complete with waste water management and, for the chemical wash, waste retrieval using a clarifier or separator.

还要有相应的排污设施，包括废水处理和含清洗剂废水的澄清分解设备。

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Do not wash or clean the machine with strong chemical reagents or strong detergents. Clean the dust with a soft cloth. Wipe the stains with alcohol cotton ball gently.

不要用腐蚀性化学试剂、强洗涤剂清洗或擦拭仪器，请用软布擦拭仪器灰尘，如有污点请用酒精棉球轻轻擦净。

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We're not a chemical treatment that can wash off.

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But the idea that large stocks of, say, chemical shells can't be located without further tip-offs doesn't quite wash.

ECONOMIST: Weapons of mass destruction