four-way reversing valve

• 四通换向阀

four-way reversing valve的用法和样例：

例句

1. Elastic rubber ball acts as a volume displacer, and 4-way reversing valve provides fast reversing and secure sealing.
   弹性橡胶球作为体积置换器，四通换向阀实现快速换向及可靠密封。