Structure and action principle结构和动作特点 ZKJWa-0.6 0.6S ZDAW-0.6 0.6S和ZKJWb-0.6 0.6S由阀门部分和执行器部分（如DKJ，ZKJ伯纳德）等组成。
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HALS light stabilizer action and principle, together with conventional HALS structure and property in paint and coatings industry are briefly introduced.
简介了位阻胺光稳定剂(HALS)的作用原理及涂料工业中常用HALS的结构及性能。
A new double action oil well pump, which has been progressed field experiment, is discussed on its structure, principle and characteristics here.
对一种新型双作用抽油泵的结构、工作原理、技术特点进行了研制并进行了现场试验。
The structure and manufacture of new type of bits, working principle and types of fluidic drilling tools, action mechanism of anti-cave-in thinners, for difficult formation drilling were discussed.
阐述了难钻进地层用新型金刚石钻头的结构、制造特点，射流式钻具的原理、类型，以及防塌型稀释剂的作用机理。
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