It has introduced in detail on structure, Properties and main technical specifications and technical parameters of cored tool.

详细介绍了取心工具的构造、特点及其主要技术规格与技术参数。

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Basic knowledge of polyethylene material, pipe fittings specifications, pipeline construction specifications, technical points, management experience and design parameters.

聚乙烯材料基础知识、管材管件规格、管道的施工规范、技术要点、管理经验及设计参数。

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To take the gypsum body filling borehole in the Daizhuang coalmine, Jining as an example, introduced borehole design, main specifications and drilling technical parameters.

以济宁岱庄煤矿石膏体充填孔为例，介绍了该孔的设计、主要技术要求及钻进技术参数。

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