安规设计的原则The principle of safety design 3.安规认证及标准体系Safety agency approval and standards system .
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The principle is advance capability and credibility function and safety operation in the design of the drill and petroleum extraction tools.
钻采工具试验井的设计中体现了“性能先进、运行可靠、操作安全和维护便捷”的原则。
The design of the bridge is carried out in the eight-character principle of "safety, pratically, economically and aeshetic" by comparing and choosing the best one.
对该桥的设计，本着“安全、实用、经济、美观”的八字原则，本设计提出三种不同的桥型方案进行比较和选择。
The structure design, working principle, features, field test and application of the downhole safety control system are introduced in this article.
本文介绍井下安全控制系统的结构设计，工作原理，特点，现场试验和应用情况。
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