Plug your tabletop lamp into a dimmer instead of the wall socket.
直接把你的台灯插到调光器上,而不用插到墙上的插座里。
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When you purchase a lamp or a toaster, the "UL Certified" mark provides assurance that the appliance will plug into the socket in your wall and work with your home's electrical system.
The pulley is fixedly installed on the wall, and the rope which is threaded through the pulley is connected with the lamp-socket, then the other end of the rope is connected with a fixed object.