well-collimated beam

The dynamic characteristics analysis is made for the derrick structure of the offshore drilling rig in some well drilling companies. This paper mainly deals with simulation and stability analysis and simplifies each member as three-dimensional beam unit with finite element method.

对在役海洋石油钻机井架进行了结构动力特性分析，并采用有限元法将钻机井架各杆件简化为空间梁单元，对钻机井架三维计算模型进行了离散，给出了模态分析和稳定性分析结果。

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Standard instrumentation includes a speedometer with odometer and resettable tripmeter as well as indicator lights for neutral, high beam and turn signals.

国际标准仪表着陆设备标准仪表盘包括了车速里程表、短里程表、空挡、远光和转向指示灯。

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In this work we present the detailed results about the studies of the multiphoton ionization of ammonia-alcohol clusters, which were performed by using a molecular beam, the laser multiphoton ionization and a time-of-flight mass spectrometer as well as ab initio calculations.

本论文中，作者通过激光、分子束和飞行时间质谱并结合从头算理论对氨与醇的二元氢键团簇的多光子电离作了系统的研究。

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This paper intends to introduce the operation regulations of anchorage beam static pressure pile issued by the Company itself and put forward some suggestions of how to solve the problems concerning design, construction, testing and quality inspection as well as the innovation of construction plant.

文章主要介绍苏州建院营造有限公司企业标准《锚梁静压桩操作规程》中有关设计、施工、测试质检等常见问题的认识与处理，以及技术设备的更新作了一定探讨。

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Practice of anchored caission beam combined with retaining well in high-steep slope reinforcement

锚拉式井字梁结合挡墙加固高陡边坡的实践

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