当你购买灯具或烤面包机时，“UL认证”标志提供了一个保证，它确保该电器可以和你家墙上的插座相匹配，并且兼容你家中的整个电气系统。
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.
伟纳电气是一家专业从事开发高品质开关插座、插头转接器、各种电子电器产品的高新企业。
Wei Steiner electric is a professional engaged in the development of high-quality switch socket, plug adapter, a variety of electrical and electronic products-tech enterprises.
绝大多数电源插座有一个地线端与大地相连，这通常是为保障建筑电气系统的安全而采取的安全措施。
Most electrical outlets have a prong that connects to the earth ground, which is also usually wired into the building electrical system for safety.
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