@RadCentrism Not just CR (might imagine safety concern over self-constructed devices, whether or not valid).
Does. Not. Allow. ANY. Air Cleaners.
https://twitter.com/JennaACunn...
@RadCentrism不仅仅是CR（可能会想象对自建设备的安全担忧，无论是否有效）。
做不允许任何空气清洁器。
https://twitter.com/JennaACunn...