词汇	doublenon-return valve
释义	doublenon-return valve 🌏双止回阀
随便看	under-voltage detector undervoltage device under voltage distribution network under-voltage load undervoltage load shedding under voltage load shedding under-voltage load shedding undervoltage lockout under-voltage lockout under voltage lock out undervoltage no-close release under-voltage noclose release under voltage no close release under-voltage no-close release under voltage open phase relay under-voltage open phase relay undervoltage/overvoltage under voltage power line communication undervoltage protection under voltage protection under-voltage protection undervoltage protection circuit undervoltagerelay undervoltage relay under voltage relay