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在制作弯管的过程中,因弯管外弧管壁和弯管的中心均受到不同程度的拉力而伸长,而弯管内弧管壁则受到压力而缩短。那么,它既不受到拉力又不受到压力的部位在弯管截面的哪个部位,该位置对于弯管制作的质量乃至管道安装质量的提高,起到至关重要的作用(图1)。笔者在多年的施工过程中,利用工程中所用的弯管,在制作中用不同规格试验,得
During the process of making the elbow, the center of the arc pipe wall and the elbow pipe are elongated due to different degrees of bending force, and the arc pipe wall of the elbow pipe is shortened under the pressure. So, where it is not under tension and no pressure in the elbow section of the site, the location of the elbow for the production of quality and even the quality of pipe installation plays a crucial role (Figure 1). The author in many years of construction process, the use of engineering in the elbow, in the production of different specifications of the test, too