protection tube 保护管 ; 塑料保护管 ; 防护套管 ; 防护管
tube protection 套管保护
Steel-tube protection 钢护筒护壁
pick-up tube protection circuit 摄像管保护电路
ceramic protection tube 陶瓷保护套管
Protection tube diameter 保护管直径
Fixable Metal Protection Tube 金属保护管
tube overload protection 管过载保护
Figure 3 shows a green LED inside an inverted test tube for protection against rain.
图3显示了位于一个倒转试管(用来做防雨保护)内的一个绿色LED。
This paper introduces successful construction method and control measure currently used for holedrill, borehole deviation, protection tube, and embedment and installation of bimetal mark.
介绍了目前比较成功的倒垂孔钻孔、钻孔偏斜、保护管安装、双金属标的埋设及安装等施工方法和控制措施。
The tower tube structure to prevent counterbalance freefall provides ideal support, to ensure that the load loss protection is on the safe side.
六是塔筒结构为防止平衡重自由落体坠落提供了理想的支撑载体，确保了失载保护的万无一失。
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