The design and construction of prestressed anchor bar in pit supporting structure of row of piles are key about safety of foundation pit.
排桩预应力基坑支护结构中预应力锚杆的设计和施工是关系基坑安全大计的关键。
Analyzing the result data of the grouting tests, the writer raises some recommendations about construction process and parameters such as hole arrangement, hole row gap and grouting pressure.
通过对灌浆资料成果分析，对布孔形式、孔排距、灌浆压力等施工参数和施工工艺提出了建议。
In this article, the principle, construction and use of the measuring instrument for preloads in double row cylindrical roller bearings used in machine tool spindles are narrated.
本文叙述了机床主轴部件常用的双列圆柱滚子轴承预紧量测量仪的原理、结构和使用方法。
Single row angular contact ball bearing with two piece inner ring has complex construction, long design cycle, great difficulty in processing.
双半内圈四点接触球轴承结构复杂、设计周期长、加工难度大。
Controlled blasting technology that is an excavation mode of small-bore and subordinate blasting row by row is used in construction.
云峰大坝抗滑墩基础开挖工程紧邻大坝，施工中采取了控制爆破技术，即小孔径、逐排分段爆破的开挖方式。
The construction of this ball bearing is similar to mounting two single row angular ball bearings back to back(DB).
这个球轴承结构越来越相似 ，两个单列角球轴承背对背（DB）的。
The construction of this ball bearing is similar to mounting two single row angular ball bearings back to back(DB).
这个球轴承结构越来越相似 ，两个单列角球轴承背对背（DB）的。
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