Material used in pre-treatment systems to reduce the tendency of the chemicals to foam.

在前处理体系中减少化学泡沫的材料。

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The pre-treatment of them before conventional cyanide leaching includes roast, chemical oxidation and biological oxidation.

在传统氰化浸出之前进行的预处理过程包括焙烧，化学氧化和生物氧化。

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No ' differences were found between pre-treatment and post-treatment (P>0.05) in relation to extent of extrusion of lumbar disc.

结果显示治疗前后突出椎间盘的突出程度无显著差异（P＞0.05）。

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Former Presidents Ronald Reagan, Bill Clinton and George W.Bush all received treatment for skin cancer or pre-cancerous lesions.

VOA: special.2010.07.06

Ninety percent of electronic waste currently ends up in disposal or shredding without any pre-treatment.

CNN: EU proposals aim to reduce electronic waste

However, statin pre-treatment had no influence on the risk of dying, stroke, heart attack or kidney failure around the time of the operation.

FORBES: Preoperative Statins Found to Reduce AF and Length of Stay But Not Mortality

Two other competing systems, pre-treatment by a nuclear waste technology firm Kurion and fine removal by energy conglomerate Areva, cleaned the other four.

FORBES: Major Milestones Passed At The Fukushima Daiichi Nuclear Power Plant