A片免费在线观看网址,a片人人操,五月天性视频,加勒比av成人,AA三级影片

Use and maintenance of catalytic silencer
1. The selection of catalytic muffler must be matched with the air volume of the fan. The applicable air volume of the muffler should not be less than the rated air volume of the fan.
2, through the medium can not contain corrosive substances, water and oil fog, dust content should be less than 150mg/m3 (standard).
3, the installation should be equipped with a strong enough support, and vibration prevention measures, and the connection between the muffler and the fan should be added elastic pad.
4, muffler strictly prevent rain, foreign bodies into.