：RETZ瑞茨/我们一直致力于流体控制领域的持续，始于2005……进口燃气紧急切断电磁阀在日常工作中处于常开状态，电磁阀线圈处于断电状态，不消耗电能 The gas emergency shut-off solenoid valve is in a normally open state in daily work, and the solenoid valve coil is in
