国产剧情探花高颜值在线,91av在线播放观看国产,强壮公弄得我次次高潮小说,国产在线不卡人成人小说,久久亚洲精品成人?v观看,国产乱女乱子视频在线播放,024亚洲国产乱人视频,国产精品福利影院,欧美精品v国产在线观看,高清少妇三级亚洲

　　風(fēng)管厚度與尺寸規(guī)范是高壓厚度0.75mm630＜邊長≤1000。中低壓厚度0.75mm，高壓厚度1mm1000＜邊長≤1250，中低壓厚度1mm。

　　The thickness and size specification of the air duct is 0.75mm630<side length ≤ 1000 for high-pressure thickness. The thickness of medium and low pressure is 0.75mm, the thickness of high pressure is 1mm, and the side length is ≤ 1250. The thickness of medium and low pressure is 1mm.

　　1、風(fēng)管就是用于空氣輸送和分布的管道系統(tǒng)，風(fēng)管可按截面形狀和材質(zhì)分類。按截面形狀，風(fēng)管可分為圓形風(fēng)管，矩形風(fēng)管，扁圓風(fēng)管等多種，其中圓形風(fēng)管阻力最小的高度尺寸最大，制作復(fù)雜。所以應(yīng)用以矩形風(fēng)管為主。按材質(zhì)風(fēng)管可分為金屬風(fēng)管，復(fù)合風(fēng)管等。

　　1. Air duct is a piping system used for air transportation and distribution, which can be classified according to cross-sectional shape and material. According to the cross-sectional shape, air ducts can be divided into various types, such as circular ducts, rectangular ducts, flat circular ducts, etc. Among them, circular ducts have the smallest resistance and the largest height size, making their production complex. So the application is mainly based on rectangular air ducts. According to the material, air ducts can be divided into metal ducts, composite ducts, etc.

　　2、風(fēng)管與風(fēng)道的區(qū)別。主要在于材料不同風(fēng)管一般由不銹鋼等材料制作而成；風(fēng)道是用混凝土、磚等建筑材料砌筑而成。風(fēng)管是用于空氣輸送和分布的管道系統(tǒng)。有復(fù)合風(fēng)管和無機風(fēng)管兩種。風(fēng)管可按截面形狀和材質(zhì)分類，風(fēng)道是指用混凝土、磚等建筑材料砌筑而成的用于空氣流通的通道。它的尺寸與風(fēng)管相關(guān)。

　　2. The difference between air ducts and ducts. Mainly due to different materials, air ducts are generally made of materials such as stainless steel; Air ducts are built with building materials such as concrete and bricks. Air duct is a piping system used for air transportation and distribution. There are two types of air ducts: composite air ducts and inorganic air ducts. Air ducts can be classified according to their cross-sectional shape and material. Air ducts refer to passages built with building materials such as concrete and bricks for air circulation. Its size is related to the air duct.

　　3、風(fēng)管按材質(zhì)可分為金屬風(fēng)管，復(fù)合風(fēng)管，高分子風(fēng)管。用途區(qū)分是凈化空調(diào)系統(tǒng)用風(fēng)管鍍鋅板、不銹鋼，中央空調(diào)系統(tǒng)用風(fēng)管鍍鋅板、彩鋼保溫板，環(huán)境控制系統(tǒng)用風(fēng)管鍍鋅板、不銹鋼，工業(yè)通風(fēng)系統(tǒng)用風(fēng)管鋼板、鍍鋅板，特殊使用場合用風(fēng)管礦用涂膠布風(fēng)筒、礦用塑料通風(fēng)管。

　　3. Air ducts can be divided into metal ducts, composite ducts, and polymer ducts according to their materials. The purpose differentiation is to use galvanized steel and stainless steel for air ducts in purification air conditioning systems, galvanized steel and color steel insulation plates for air ducts in central air conditioning systems, galvanized steel and stainless steel for air ducts in environmental control systems, steel and galvanized steel plates for air ducts in industrial ventilation systems, and coated fabric air ducts for special use occasions, as well as plastic ventilation ducts for mining.