เหตุผลที่วาล์วต้องอาศัยหัวขับวาล์วในการควบคุมมีดังนี้ Removing the pneumatic pressure triggers the piston to maneuver downward because of the pressure from the spring. This motion is generally known as Air-to-Retract. The compressed air is controlled by solenoid valves. The controller sends electrical siglnals that possibly open or closes the solenoid valve by energizing it. This https://travisuyfge.mdkblog.com/19532545/how-วาล-ว-can-save-you-time-stress-and-money