| 摘要 |
PURPOSE:To uniformly remove aerosol in a factory building with an inexpensive device even though many suction ducts are not used. CONSTITUTION:One or more faces of a casing 2 in the longitudinal direction constitute an opening face 5 and also a filter 27 covering the opening face 5 is driven circularly and a drain pan 28 is provided at the lower part of the filter 27. Thus, the device does not suck concentrically a specific place, while sucks with the faces in the longitudinal direction. |
