在三元乙丙橡胶(EPDM)阀座上不要使用凡士林或其它石油基产品。
Do not use Vaseline or other petroleum - based products on EPDM seats.
反应硼化烧结法制备的三元复合硼化物基新型硬质合金，具有优良的物理、化学、力学性能。
New type cemented carbide of ternary complex boride base prepared by reaction boronizing sintering technique has excellent physical, chemical and mechanical properties.
在合成了几种带不同组成比吖啶基三元共聚物的基础上，对其溶液和薄膜的吸收与荧光发光光谱进行了表征。
Based on the synthesis of different terpolymers with acridine group, the absorption and fluorescence spectra of these compounds in solution and membrane were recorded respectively.
将涤纶废产物用二甘醇和三元醇经酯基转移合成齐聚酯多元醇，并用其制备聚氨酯硬质泡沫塑料。
A study was conducted to synthesize oligoester alcohols from poly (ethylene terephthalate) production wastes via transesterification with diethylene glycol and tribasic alcohol.
三元树脂由乙烯基磺酸酯、甲基丙烯酸甲酯（MMA）与甲基丙烯酸（MAA）按不同的配比共聚而成。
The polymer was prepared by copolymerizing vinyl sulfonate, methyl methacrylate(MMA) and methacrylic acid(MAA) in different proportions.
由聚对苯二甲酸丁二醇酯（PBT）， 聚碳酸酯（PC）和热塑性弹性体（ TPE） 组成的三元塑料合金是PBT基塑料合金的新一代。
This paper describes a new generation of PBT based polymer alloy which is composed of PBT, PC TPE.
发明的三元：（一）一乙烯基酰胺，如聚乙烯吡咯烷酮或乙烯基己内酰胺；
The terpolymers of the invention: (a) a vinyl lactam, such as vinyl pyrrolidone or vinyl caprolactam;
发明的三元：（一）一乙烯基酰胺，如聚乙烯吡咯烷酮或乙烯基己内酰胺；
The terpolymers of the invention: (a) a vinyl lactam, such as vinyl pyrrolidone or vinyl caprolactam;
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