The invention discloses an exhaust air duct cleaning system, which comprises an exhaust air duct, a dust collecting device, and a collecting device.

本发明公开了一种排气风管清洁系统，该清洁系统包含排气风管、集尘装置以及收集装置。

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The utility model relates to an exhaust duct that prevents head wind, especially to a movable air discharging door type one-way air exhaust device.

本实用新型涉及一种防逆风排风管，特别是涉及一种活动排风门式的单向 排风装置。

youdao

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

Consider the newspaper 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: Johnny One-note