涩老板在线免费视频_午夜成人精品_神马理论午夜,,_亚洲有薄码区久久欧美精品一区_97人人色_神马在线精品_成人熟女一区二区_亚洲二区三区四区_人妻午夜免费_大鸡巴猛男爆操骚逼国产一区二区_丁香婷婷久久一区二区三区_岛国内射美女_亚洲一级电影,亚洲欧美日韩国产最新版,亚洲五月综合缴情综合久久本,少妇色情喷水又紧又爽小说,巜上司的少妇的滋味,国产精品三级女人国产香蕉,亚洲最好的免费电影,欧美亚洲国产成人精品,国产永久一区二区三区,亚洲综合一区无码精品,歳の熟女セックス,内射带小孩熟妇,果冻传媒在线看免费视频观看,成人欧美一区二区三区片,亚洲 片内射欧美美妇,一本无码人妻在中文字幕免费,亚洲无毛视频,中文字幕丰满孑伦无码专区,亚洲爆乳无码专区色戒纶理,肉乳床欢无码片动漫软件,欧美日韩一区二区另类,久热只有精品在线直播,精品亚洲一区二区在线播放,精品国产乱码久久久久久影片,国产一级高清在线观看,国产精品福利在线一区,成人动漫下载,乱伦性爱视频,xo无码AV毛,国产黄A片免费网站免费,日韩欧美一级特黄特色大片

Ventilation duct is a municipal infrastructure to circulate air and reduce the concentration of harmful gases. The plates, profiles and other main finished materials used for the fabrication and installation of ventilation pipes and air ducts shall comply with the provisions of the current design and relevant product standards, and the factory inspection certificate shall be applied. The materials shall be accepted according to the current relevant standards when entering the site. Ventilation pipes are divided by material: generally, they are: steel plate air pipe, galvanized plate air pipe, stainless steel air pipe, FRP air pipe, plastic air pipe, composite air pipe, color steel sandwich insulation plate air pipe, double-sided aluminum foil insulation air pipe, single-sided color steel insulation air pipe, adhesive coated cloth air pipe, mining plastic air pipe, etc;

1.對于比較復雜的民用建筑，在設計階段，各工種首先應協商好空間分隔，定出每種管道的標高范圍。一般情況下不得越出給自己規定的界限。遇有個別管段要越界時應與其他工程協商。

1. For complex civil buildings, in the design stage, various types of work shall first negotiate the space separation and determine the elevation range of each kind of pipeline. Under normal circumstances, you shall not go beyond the limits set for yourself. In case of crossing the boundary of an individual pipe section, it shall negotiate with other projects.

2.解決各種通風管道相碰及協調的原則，一般為：“小管讓大管，有壓讓無壓”。例如，自來水管與風管相撞，則應當自來水管拐彎。冷、熱水管與下水管相碰，則應改變冷、熱水管道。

2. The principle to solve the collision and coordination of various ventilation pipes is generally as follows: "small pipe gives way to large pipe, pressure gives way to no pressure". For example, if the water pipe collides with the air pipe, the water pipe should turn. If the cold and hot water pipes collide with the downpipe, the cold and hot water pipes shall be changed.

3.施工前應設備總管的工程師，將各工種的管線，單線畫在一張平面圖上。每種管道用一種彩色筆。在各交點處綜合其標高，看是否有矛盾之處，及時發現，將問題解決在安裝之前。

3. Before construction, the engineer of the equipment header shall draw the pipeline and single line of each type of work on a plan. Use a color pen for each pipe. Synthesize the elevation at each intersection to see if there is any contradiction, find it in time and solve the problem before installation.

4.為了減少投資，節省空間，降低層高，有些敷設無坡度要求的管道，可以穿梁敷設。

4. In order to reduce investment, save space and reduce floor height, some pipes without slope requirements can be laid through beams.