From the structural features of the measuring system, a mathematic model is constructed for the absolutely mechanical follow up system to perfect its operating principle.

根据测试系统的结构特点，建立了绝对的机械随动式测量方法的数学模型，完善了其测量原理。

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Drilling mast being as the key part of drilling equipment, its mechanical behavior is closely related to the safety of the operating drilling system.

钻井井架作为钻机系统设备中的关键部分，其力学性能直接关系到整套钻机系统的安全生产。

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Recommendations on how to perform the kinematic and dynamic research of mechanical shovels and the implementation of automatic control system for the operating process of the shovel are presented.

提出了如何开展挖掘机运动学与动力学的研究，以及采用挖掘机工作过程自动控制系统的建议。

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Under its shiny new skin, new hardware and software, such as a slimmed down version of Apple's OS X operating system and a flash memory drive, instead of the current iPod's mechanical hard drive, could keep the new device thin and light.

FORBES: The Next iPod