单词pech
网络: 环氧氯丙烷；岩精；环氧氯丙烷低聚物
复数：pechs
过去分词：peched
现在分词：peching
It is discovered through experiment that treating PECHs with different relative molecular mass should use different extraction solvents.
实验表明，处理不同相对分子质量的PECH，应采用不同的萃取溶剂。
The hydroxy value of hydroxy-terminated polyepichlorohydrin (PECH) is a very important index which influences many properties of PECH.
端羟基聚环氧氯丙烷（PECH）的羟值是影响其性质的重要指标。
The results demonstrated that PECH-DMA could greatly enhance the removal efficiency of NTU and organic substances.
结果表明：助凝效果明显，浊度和有机物的去除效果都得到明显提高。
Pech Valley, Afghanistan: As darkness falls a US soldier smokes a cigarette before getting into his armored vehicle for a night patrol
佩赫谷，阿富汗：夜幕降临，一个美国士兵在进入装甲车夜巡前吸烟。
Experimental Study on Sedimentation Water Quality Improvement in Pech-David Water Plant in Toulouse in France
改善法国图卢兹自来水厂沉淀池出水水质的实验研究
A Study on the Modification of Cellulosic Fibers with Low Molecular Weight and Moderate Nitrogen Content of PECH-amine
低分子量、含氮量适中的聚环氧氯丙烷胺化物对纤维素纤维改性工艺的研究