立式三螺杆泵采用机械密封加骨架油封双重密封方式，无泄露。
Vertical three-screw pump adopts double seal mechanical seal and framework oil seal, no leakage.
论及了骨架式光缆与其它大芯数光缆在装纤密度、工程安装、机械性能等方面的优势，同时阐明骨架式光缆的发展前景。
This paper described slotted core cable's advantage on fiber density, engineering installation and mechanical property compared with other high-count fiber cable and its development prospect.
本文将就近几年关于机械刺激下成骨细胞骨架的改变及作用机制的研究进展进行综述。
This paper summarizes the recent advances about the effects and possible mechanism of mechanical stimulation on osteoblast cytoskeleton.
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