Mounted to the inside of the helmet shell, the system is extremely small and lightweight.
该系统非常小巧轻便，安装在头盔内侧。
Surface mounted closers shall be full rack and pinion type, with pressure cast alloy shell, with no more than 53 mm (2 1/8") projection from the door surface."
表面安装式关门装置应是全齿条的和小齿轮型的，带压力铸造合金的外壳，从门表面突出不超过53毫米（2 1/8英寸）。
Torsional vibration of a circular piezoelectric shell of polarized ceramics mounted on a rotationally vibrating base was analyzed.
以线性压电理论为基础，分析了压电陶瓷圆柱壳的扭转振动问题。
应用推荐