The last known case was in Britain in 1978 when a university photographer who worked above a lab handling smallpox died after being accidentally exposed to it from the building's air duct system.

众所周知的世上最后一例天花发生在1978年的英国。 那是一个（无辜的）大学摄影师，当时他正在天花实验室的楼上房间里工作，死于接触到大楼的风道系统偶然带出来的天花病毒。 （译者注：这位摄影师也太冤了。）

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Analyses the testing results of some project examples after air duct cleaning.

分析了几个实际工程风管清洗后的测试结果。

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The main manufacturers for air duct cleaning robot, the features of the robots manufacturedboth abroad and in China, and the applications of robot for air duct cleaning in China were described.

介绍了国外风管清洗机器人的主要生产厂家、国产机器人和外国产品的各自特点及国产机器人的应用情况。

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The Picnic room features a sizable picnic table, astroturf, and a paper-mache tree that was fashioned out of an air duct.

FORBES: Startup Hires Set Designers to Trick Out Office on a Dime

They soon found that duct tape leaked air so badly much of the cooling and heating was wasted--and that the tape frequently shrunk, dried up or separated.

FORBES: The Other Greatest Tool Ever

Consider media accounts of how WD-40 was used to extract a python from a bus exhaust pipe or a burglar stuck in an air duct (yes, he was arrested).

FORBES: Greasy Coca-Cola