电力计,瓦特计

当啷一声,马屁精在混乱中打碎了格格作响的瓦特表.

single-phase wattmeter manufacturing technology and key equipment

three-wattmeter method【电】

hot-wire wattmeter【电】

integrating wattmeter

low power factor wattmeter

indirect acting type recording wattmeter

integrating wattmeter

polyphase wattmeter