叉管在水电站压力管道以及石油、比工或大型给排水管道中,应用十分普遍。其中带公切球的园锥或园柱形叉管又占大多数。这类叉管的交线是平面曲线——椭园的一部分,因而大多可以归结为图一所示的截割园锥的情况,即园锥被平面AE和BE斜截。在《水电机电安装技术》82年第三期上曾刊登了用微型电算机ALGOL语言计算这类问题 Fork pipe in the hydropower station pressure pipe and oil, than workers or large-scale water supply and drainage pipe, the application is very common. Among them, the conic or the cylindrical fork pipe with public cut ball accounted for the majority. The intersection of these tubes is a part of the plane curve, the elliptical, and most of them can be attributed to the case of the cut cone shown in Figure 1, where the cone is truncated by the planes AE and BE. In the “Hydropower Electrical Installation Technology,” the third issue of 82 published in the computer with microcomputer ALGOL language to calculate such problems