亚洲精品鲁一鲁一区二区三区-最爽无遮挡行房视频-强壮的公次次弄得我高潮A片日本-精品人妻无码一区二区三区换脸-中文字幕亚韩-亚洲国产精品一区二区第一页-丰满岳乱妇一区二区三区-大陆极品少妇内射AAAAAA-国产乱人伦AV麻豆网-AV国産精品毛片一区二区三区-午夜精品视频在线无码-免费精品一区二区三区A片在线-在线天堂无限次观看,亚洲日韩无码一区二区,中文字幕乱人伦视频在线,亚洲欧美熟妇综合久久久久久,少妇无码一区二区三区免费久久,欧美黑人一级片在线观看,久久久精品无码一区三区,国产视频在线观看蜜芽,大香蕉五月婷婷精品视频 ,久草精品在线,国产无码在线播放一区二区,囯产无码交换大片在线播放,八戒八戒在线高清观看视频 ,娇妻被又粗又长又猛玩,国产曰肥老太婆无遮挡,国产剧情黄色,国产成年无码久久久久毛片資訊,大香蕉太香蕉成人现现,逼逼爱爱爱无码免费观看,亚州色图欧美图片自偷自拍,碰碰视频麻豆,午夜一本,一起射综合影院,黑人干熟女,欧洲高清转码区一二区 ,国产高清视频色拍,粉嫩无码小泬无套在线观看,大香蕉在线网站,成人做爰理论片,成人漫,9l视频自拍九色9l成人

　　PP air duct, also known as plastic air duct, is a kind of air duct made of PP raw materials or sheet materials. There are two kinds of air ducts: conventional air duct and flame retardant air duct.

　　PP管道是一種降低有害氣體濃度的基礎設施。PP風管的生產和安裝的板材、管材等主要成品材料按照設計及相關成品的現行國家標準進行，并申請出廠檢驗合格證，進廠材料應按照現行國家標準進行。

　　PP pipeline is an infrastructure to reduce the concentration of harmful gases. PP air duct production and installation of plates, pipes and other main finished materials shall be carried out in accordance with the current national standards of the design and related finished products, and the factory inspection certificate shall be applied for. Incoming materials shall be carried out in accordance with the current national standards.

　　根據作用機理的不同，全通氣可分為稀釋通風和置換通風。

　　According to the mechanism, total ventilation can be divided into dilution ventilation and displacement ventilation.

　　稀釋通風，又稱混合通風，即送人比室內污染物濃度低的空氣與室內空氣混合，以降低室內污染物濃度，達到難以達到的衛生標準。

　　Dilution ventilation, also known as mixed ventilation, is to send people to mix the air with the indoor air which is lower than the concentration of indoor pollutants, so as to reduce the concentration of indoor pollutants and reach the health standards that are difficult to reach.

　　在置換通風系統中，新鮮的冷空氣以極低的速度從房間底部出來

　　In a displacement ventilation system, fresh cold air comes out of the bottom of the room at a very low speed

　　像水一樣稠密的新鮮空氣充滿了房間的底部。熱源引起的對流熱空氣使室內溫度垂直波動，氣流緩慢上升，離開工作區域。

　　Fresh air, as dense as water, fills the bottom of the room. The convective hot air caused by the heat source makes the indoor temperature fluctuate vertically, the air flow rises slowly and leaves the working area.

　　室內空氣就像活塞一樣。房間的空氣從頂部也活躍,和操作區域基本上是空氣進來,也就是說,污染物的濃度在操作區域約等于空氣的濃度,這是區別置換通風和傳統稀釋通風。

　　Indoor air is like a piston. The air in the room is also active from the top, and the operation area is basically the air coming in, that is to say, the concentration of pollutants in the operation area is about equal to the concentration of air, which is the difference between displacement ventilation and traditional dilution ventilation.

　　阻燃風管是一種先進的環保技術。它的作用是凈化廢氣和灰塵，使我們的生活環境越來越好。

　　Flame retardant air duct is an advanced environmental protection technology. Its function is to purify exhaust gas and dust, so that our living environment is getting better and better.

　　有害氣體處理的阻燃管主要包括硫酸霧,鹽酸霧,鉻酸霧,硝酸霧,霧磷酸、氫氟酸霧,氯化氫,氟化氫、硫化氫、氰化氫和其它高污染產業吸收和凈化處理,符合要求。

　　The flame retardant tubes for hazardous gas treatment mainly include sulfuric acid mist, hydrochloric acid mist, chromic acid mist, nitric acid mist, phosphoric acid mist, hydrofluoric acid mist, hydrogen chloride, hydrogen fluoride, hydrogen sulfide, hydrogen cyanide and other high pollution industries absorption and purification treatment, which meet the requirements.

　　PP阻燃管是由超高分子量聚乙烯、管材制成，其分子量可達200萬以上的小磨損指數，使其具有很高的抗滑動摩擦能力。耐磨性是一般合金鋼的6.6倍，不銹鋼的27.3倍。17.9倍于酚醛樹脂，6倍于尼龍，4倍于聚乙烯，大大提高了管道的使用壽命。

　　PP flame-retardant pipe is made of ultra-high molecular weight polyethylene and pipe. Its molecular weight can reach more than 2 million with small wear index, which makes it have high anti sliding friction ability. Wear resistance is 6.6 times that of general alloy steel and 27.3 times that of stainless steel. 17.9 times of phenolic resin, 6 times of nylon, 4 times of polyethylene, greatly improving the service life of the pipeline.

　　抽油煙機使用一段時間后,抽油煙機葉輪,排氣扇阻燃管將堅持大量的石油,提高葉輪的重量,所以它是不可避免的增加了風輪的旋轉動能,使電動機啟動電流增加。

　　After using the range hood for a period of time, the impeller of the range hood and the flame-retardant pipe of the exhaust fan will adhere to a large amount of oil and increase the weight of the impeller, so it inevitably increases the rotating kinetic energy of the fan wheel and the starting current of the motor.

　　油煙機與楊燃燒風道長期積存的油液，也會形成火災隱患。葉輪,增加粘性油阻燃管,排氣不光滑,塇來煙在廚房空間的傳播,危害人們的健康。

　　The long-term accumulation of oil in the fume hood and poplar combustion duct will also cause fire hazards. Impeller, increase viscous oil flame-retardant pipe, unsmooth exhaust, the spread of smoke in the kitchen space, endangering people's health.