vibrating reed frequency meter 振簧式频率计

reed frequency meter 振簧式频率计 ; 振动片式频率计 ; 振簧频率计

tuned-reed frequency meter [物] [仪] 调谐振簧式频率计

vibrating-reed frequency meter [物] 振簧式频率计

tuned d reed frequency meter 调谐振簧式频率计

vibrating g reed frequency meter 振簧式频率计

vibrating reed type frequency meter 振簧型频率计 ; 振簧式频率计

meter reed type frequency 振簧频率计