air duct smoke detector 空气管道式感烟探测器
duct type smoke detector 通风管式感烟探测器
duct-mounted smoke detector 安装在管道里的感烟探测器
This might mean taking big steps, like hanging light-blocking shades, or small steps, like putting duct tape over the tiny lights in smoke alarms.
这也许意味着你要采取大的措施，像挂一个遮光的灯罩，或者小的步骤，比如用布基胶带遮住烟雾报警器发出的微光。
The use of large-scale high-temperature steel welding butterfly valve manufacturer, mainly for high-temperature medium duct smoke and gas pipelines.
大型高温蝶阀采用钢板焊接制造，主要用于高温介质的烟风道和煤气管道。
This product is made up of five parts: boiler main body, smoke air duct, dust collector, pipe system.
本产品出厂时由五大部分组成：锅炉主体、烟风道、除尘器、管路系统。
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