在绘制除尘系统施工图时,经常会遇到空间管道和空间角的求法问题,这是除尘设计中比较费时而且难求的问题。问题可归结为两大类。第一类:已知空间管道的起点、终点、交点(顶点),上述各点垂直于地面的标高及管道在水平面上的投影,求其管道实 When drawing the dust removal system construction drawing, the problem of space piping and space angle is often encountered. This is a time-consuming and difficult problem in dust removal design. The problem can be attributed to two major categories. The first category: the starting point, the end point, the intersection point (vertex) of the known space pipeline, the elevation of the above-mentioned points perpendicular to the ground and the projection of the pipeline on the horizontal plane, find the actual pipeline