在意大利熟练的技术工人(工资)很昂贵,而且十分缺乏。因此,出现了一些尽可能不需要使用他们的方法,如在单管采暖装置上使用的一种万能四通接头。它可使单管采暖装置的安装既省时又省工,并可根据计数精确地分摊各用户的耗热量,实现经济管理。用它来连接主环路与支环路,可向支环路提供最大的流量而阻力为最小。采用四通接头,无论从流体动力学还是设备本身来看,除了能很简单地解决在单管供暖装置中出现的所有问题外,安装起来也很迅速。从图1中可看出,进入A Skilled skilled workers (salary) in Italy are expensive and very scarce. Therefore, there are some methods that do not need to use them as much as possible, such as a universal four-way joint used on a single-pipe heating device. It can make the installation of single-tube heating device save time and labor, and can accurately allocate the user’s heat consumption according to the count to achieve economic management. Use it to connect the main loop with the branch loop, which provides maximum flow to the branch loop with minimal resistance. The use of four-way joints, no matter from the perspective of fluid dynamics or the equipment itself, can be quickly installed in addition to the simple solution to all the problems that arise in single-pipe heating installations. As can be seen from Figure 1, enter A