What is the installation and maintenance skills of ventilation pipe?

通风管道安装保养技巧有哪些？

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The characteristics and applications of the thin plate fixed bed adsorbers in the circulation ventilation pipe systems were presented.

介绍了薄平板型固定床吸附器在循环通风管路系统中的使用特性和应用效果。

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Many people think, after the installation of ventilation pipe, the task is almost over, but do not know this idea is not desirable, this is just the first step.

不少人认为，在通风管道安装完之后，任务也就差不多结束了，却不知道这种想法是不可取的，这仅仅是第一步而已。

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Negotiators have been talking to the man through a 4in-wide (10cm) ventilation pipe.

BBC: Alabama hostage standoff for five-year-old continues

Authorities have been conferring in a nearby church and communicating with Dykes through a ventilation pipe to the underground bunker.

NPR: Ala. Town Mourns For Bus Driver Amid Standoff

During the six-day standoff, officials talked to Dykes and delivered medication and toys to the boy through a 4in (10cm) ventilation pipe.

BBC: Alabama kidnapper dead and boy saved after police raid