封闭装置 meaning in Chinese

locking device

Floor drains with bell - type odour seal ; summary
带钟形防臭封闭装置的楼层排水管.第1部分:一览表
Floor drains with bell - type odour seal ; particulars
带钟形防臭封闭装置的楼层排水管.第2部分:项目
Packaging - light gauge metal containers - aperture for plug - in rel plastic closures
包装.轻型金属测量容器.插入式rel塑封闭装置的孔径
Do not place the product in a separate enclosure unless proper ventilation are provided
除非通风良好，不要把产品放在独立的封闭装置中。
Hearing aids - specification for dimensions of the nipple and sealing device for insert earphones
助听器.第5部分:内插式耳机短接管接头和封闭装置尺寸规范

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