liquid level relay 液位继电器

coal bunker level relay [矿业] 煤位继电器

low-level relay 低电平继电器

Level relay cubicle 水平选择柜

water level relay [电] 液位继电器

float ball liquid level relay 浮球液位继电器

multi-level relay of repeater station 差转台多级中继

RELAY FOR LEVEL SWITCH 炉内加药系统液位开关继电器