扬水管是我厂生产的深井水泵的主要零件之一;根据水泵规格的不同,它有甲型和乙型两种(如图1)。甲型扬水管是用管子接头将几根联在一起的;而乙型则是用螺钉联结的。它们都是由35号无缝钢管制成。需要加工的 The water pipe is one of the main parts of the deep well pump produced by our factory. According to the different specifications of the water pump, it has two types of A and B (Figure 1). A type of submersible pipe is the use of pipe joints will be a few linked together; and B is screwed. They are made of 35 seamless steel tubes. Need to process