Owing to space constraints, this paper introduced only NIRVANA injection screw air compressor characteristic.
由于篇幅的限制，本文仅介绍NIRVANA喷油螺杆空压机的特点。
Grinding head on, sliding imports of dual-use system linear guide, two-ball screw drive, to achieve the smooth running speed to eliminate mobile space (displacement).
磨头座、滑动系统采用进口的双直线导轨、双滚珠丝杆传动，以达到运行速度平稳、消除移动间隙(位移)。
In this paper we shall give the short transformation formulas by discussing transformation property of screw for space rotation, and also discuss transformation property for inversion.
本文通过螺旋对空间旋转的变换性质的讨论，给出了简洁的变换关系式。此外，还讨论了螺旋对空间反演的变换性质。这些对于螺旋场的研究都是有益的。
Objective To investigate the changes of soft and hard tissues after extraction space closure with micro-screw implant as orthodontic anchorage.
目的研究以微螺钉为支抗，用直丝弓矫治器滑动法关闭拔牙间隙后的软硬组织变化。
Intraoperative posterior approach general spine pedicle screw-rod orthopaedics fixation system used and iliac bone block were implanted in space of posterior atlantal arch and axial vertebral plate.
术中应用经后路通用脊柱椎弓根钉棒矫形固定系统固定，同时在寰椎后弓和枢椎椎板间大量髂骨植骨融合。
Intraoperative posterior approach general spine pedicle screw-rod orthopaedics fixation system used and iliac bone block were implanted in space of posterior atlantal arch and axial vertebral plate.
术中应用经后路通用脊柱椎弓根钉棒矫形固定系统固定，同时在寰椎后弓和枢椎椎板间大量髂骨植骨融合。
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