国产牲交视频免费无遮挡,日日摸日日碰夜夜爽免费,国产毛片一级国语版,久久国产高清免费,京香julia在线播放,らだ天堂√在线中文,青青青在线视频国产剧情,婷婷国产成人精品一区二,国产精品视精品国产免费,可以免费观看的国产视频

　　Good fire performance of ventilation duct 1 in the power house: at present, the common problem is that the combustion performance and fire resistance limit of the finished ventilation duct have not been tested by the relevant departments, and the combustion performance and pipe wall thickness of some ventilation duct materials do not meet the requirements.

　　進(jìn)行應(yīng)用的廠房通風(fēng)管道，在很大的程度上其實(shí)也就是能直接的就減少地下室通風(fēng)上部空間占用以及其風(fēng)管用量。地下室通風(fēng)方式合理，就其在進(jìn)行布置的時(shí)候，排風(fēng)管及排風(fēng)口，平時(shí)排風(fēng)用，火災(zāi)的時(shí)候必然會(huì)兼作排煙風(fēng)管與排煙口。增加了室內(nèi)空間，密閉性好、不返煙、不返臭，能大幅度改善室內(nèi)環(huán)境。

　　To a large extent, the ventilation duct of the workshop which is applied professionally can directly reduce the occupation of the upper space of the basement ventilation and the amount of its air duct. The ventilation mode of the basement is reasonable. When it is arranged, the exhaust duct and air outlet are usually used for air exhaust. In case of fire, they must be used as both smoke exhaust duct and smoke outlet. The indoor environment can be greatly improved by increasing the indoor space, good airtightness, no return of smoke and odor.

　　在進(jìn)行廠房通風(fēng)管道1設(shè)計(jì)的時(shí)候，污水處理設(shè)備還要考慮一下排風(fēng)、排煙方面的措施。對(duì)于普通離心風(fēng)機(jī)本身也就是能滿(mǎn)足排風(fēng)排煙方面的要求，但是大風(fēng)量離心風(fēng)機(jī)只可以安裝在地面上，不過(guò)就其占地比較大，需要較大機(jī)房，高溫軸流風(fēng)機(jī)為消防專(zhuān)用風(fēng)機(jī)，這時(shí)候也就是能滿(mǎn)足在280℃ 煙溫之下運(yùn)行30 min的要求

　　In the design of ventilation pipe 1 of the power house, the measures of air exhaust and smoke exhaust should be considered for the sewage treatment equipment. For ordinary centrifugal fans, they can meet the requirements of exhaust and smoke exhaust. However, large volume centrifugal fans can only be installed on the ground, but they occupy a large area and need a large machine room. High temperature axial flow fans are special fans for fire protection. At this time, they can meet the requirements of 30 min operation under 280 ℃ smoke temperature