signal loading valve 信号加载阀

ball loading valve [矿业] 球形排药阀

Servo loading valve 伺服加载阀

ground loading valve 地面加注阀

chamber loading valve 气室装填阀

pressure loading valve 减压阀门

needle valve of loading 增载针阀

valve loading spring 承阀弹簧

pilot valve loading spring 先导阀加载弹簧