Abstract: This paper expounds the WSH/Y - Ⅳ type no damage well-flushing technique and the internal structure of tubing string theory, sit in the reservoir, casing, sit after the single cylinder seals and glue, formation of oil above the liquid flow through a single cylinder valve into rubber ring hollow above.
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This paper expounds the applications of sulfited lanoline.
本文阐述了亚硫酸化羊毛脂的应用。
This paper expounds the necessity of data transfer among different CAD systems.
本文阐述了在不同的CAD系统之间传送数据的必要性。
This paper expounds the social educational functions of the library in quality education for teenagers.
阐述了图书馆在青少年素质教育中所起的社会教育职能。
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