The installation of general smoke exhaust fan system software and air conditioning unit shall be carried out after the construction of house building bent structure project, the obstacles have been removed and the road surface is free of dirt. The pipeline cannot be supported immediately. The support frame or support shall be set independently on the machinery and equipment containing various valves. The welding of smoke exhaust and ventilation pipes shall be located in areas with convenient engineering construction or low in-situ stress. Welding shall not be located at the support frame, and the spacing shall not be less than 200mm.

国产精品伦一区二区三级视频系统通风99无码熟妇丰满人妻啪啪布局的一般标准：

General criteria for layout of ventilation ducts of smoke exhaust system:

1.不一样的烟尘汽体具备不一样的特性，因而清洁应在不一样的一部分开展解决。

1. Different soot vapors have different characteristics, so cleaning should be carried out in different parts.

当污染物长期集中化在一个净化设备里时，他们能够分成好多个系统软件。殊不知，空气污染物的混和会造成点燃、发生爆炸风险及其不一样溫度和环境湿度的汽体。混和后，99无码熟妇丰满人妻啪啪中会出現冷疑、尘土或不一样特性的汽体，危害收购或清洁高 效率。

When pollutants are concentrated in one purification equipment for a long time, they can be divided into many system software. As everyone knows, the mixing of air pollutants will cause ignition, explosion risk and steam with different temperature and ambient humidity. After mixing, cold, dust or steam with different characteristics will appear in the pipeline, endangering the purchase or cleaning efficiency.

2.99无码熟妇丰满人妻啪啪系统软件合理布局应降低摩擦阻力

2. Reasonable layout of pipeline system software shall reduce friction resistance

一般来说，环形风管抗压强度大，原材料耗费少，但占有室内空间大。矩形框99无码熟妇丰满人妻啪啪占有室内空间小，便于布局，但也一定遵照具体室内空间。

Generally speaking, the annular air duct has high compressive strength and low raw material consumption, but it occupies a large indoor space. Rectangular frame pipe occupies a small indoor space, which is convenient for layout, but it must also follow the specific indoor space.

3.99无码熟妇丰满人妻啪啪系统软件的铺设标准

3. Laying standard of pipeline system software

99无码熟妇丰满人妻啪啪铺装有二种种类：敞开式和内藏式。维护保养一般选用敞开式安装。当不可以选用敞开式安装时，考虑到掩藏安装方法。99无码熟妇丰满人妻啪啪应尽量成形布局，并沿墙或柱平行面铺设。假如管经很大或隔热保温应建在墙侧。一般状况下，两根99无码熟妇丰满人妻啪啪平行面布局时，间隔不可低于100~200mm

There are two types of pipe pavement: open type and built-in type. Generally, open installation is selected for maintenance. When open installation is not possible, the concealed installation method shall be considered. Pipes shall be laid in a shaped layout as far as possible and shall be laid parallel to walls or columns. If the pipe is large or insulated, it should be built on the side of the wall. Generally, when two pipes are arranged in parallel, the spacing shall not be less than 100 ~ 200mm