Stainless steel building door each door switch corresponds to a household extension, in fact, the power switch stainless steel security door, after the switch is pressed, the power is turned on households. Extension was electric, extension inside the musical sound. After the extension hook toggle switch is switched to the electric amplifier circuit section stainless steel security door rankings can be a talkback. Therefore, this doorbell into the family has six lines, in addition to a different outer ring, the other is parallel. When do you hook home intercom listen, as you can hear the conversation. Stainless steel floor apartment doors of St. Chang Ltd. Yongkang superb production of stainless steel security door fittings, stainless steel security door company reliable, quality and price concessions, welcome customers and friends to buy. Stainless steel building door is one of my company's main product, then St. Chang Industry and Trade'll tell you about the installation of stainless steel building door Note: 1, the installation of stainless steel doors of buildings should be adopted in accordance with the types of building doors, to take to adapt installation method. 2, requires flexible sliding rear sliding door installation, door easy to open and close tight and firm. 3, stainless steel frame buildings can bolt the door and the wall is fixed at the time of the masonry walls can also be in the hole at the embedded iron, weld fittings and door installation. 4. Regardless of the door frame and the wall connection, each side should not be less than three anchor points, and should be firmly connected. Stainless steel security door purchase, reliable reputation of St. Chang Industry and Trade, Hunan stainless steel security door by Sheng-chang Ltd. Yongkang. Yongkang St. Chang Ltd. (www.shengchangco.com/about/) Zhejiang Jinhua, household goods inventory leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Trade and Industry Leadership at St. Chang staff warmly welcome all inquiries negotiations to create ShengChang better future for industry and trade.