生产和生活中都少不了要对各种各样的流可以是其他种类自控阀和自控装置。体进行控制，需要接成各种各样的管路。在达到（3）图6所示为两进一出的组合管路。例控制目的的前提下，管路自然越简单越好。但如，上管路通蒸汽用于加热，下管路通冷水用于是，现有的管路比较复杂，试 In production and in life, it is indispensable for various kinds of flow to be other kinds of self-control valves and automatic control devices. Body control, need to be connected into a variety of pipelines. At (3) Figure 6 shows a two-in-one combined line. Under the premise of the purpose of control, the simpler the better the pipeline naturally. But, for example, the steam on the pipeline is used for heating, the pipeline on the pipeline is used for cold water, the existing pipeline is complex,