In order to avoid the pollution of the extracting material and the inconvenience of fetching the plug, a rotating shielding door is used for the purpose of the horizontal tangential channel shielding.
水平切向孔道的屏蔽采用旋转屏蔽门屏蔽，避免了活化后塞子取出物污染空间及取放塞子的不便。
Though there are many difficulties found in design and manufacture of sliding-plug door, analysis and experimental research about them are in rare number.
作为车辆的重要装备，高速列车一般采用塞拉门来替代普通的折页门结构。 塞拉门在设计制造中面临许多难点，国内对此的研究和实验还很少。
Close the door guardrail workers into the elevator guide rail, plug, attached to a safety rope, the load center should as far as possible in the center position of the working table.
作业人员进入液压升降机后应关闭护栏门，插上插销，系上安全绳，载荷的中心应尽量处于工作台面的中心位置。
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