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2. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   The toggle light switch was invented in 1916 by William J. Newton. [2] As a component of an electrical wiring or home wiring system, the installation of light switches is regulated by some authority concerned with safety and standards. In different countries the standard dimensions of the wall mounting hardware (boxes, plates, etc.) may differ.

3. Mercury switch - Wikipedia

   en.wikipedia.org/wiki/Mercury_switch

   A Single-Pole, Single-Throw (SPST) mercury switch on millimetre graph paper, device length approximately 1.5 cm Another mercury switch design. A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit. There are several different basic ...

4. The Decorator and Furnisher - Wikipedia

   en.wikipedia.org/wiki/The_Decorator_and_Furnisher

   The Decorator and Furnisher, published in New York City from 1882 to 1897, was a monthly magazine dedicated to aspects of interior decoration. After ceasing publication it was briefly revived in 1898 under the title Home Decorator and Furnisher .

5. Guizhou WS-13 - Wikipedia

   en.wikipedia.org/wiki/Guizhou_WS-13

   The WS-13 (Chinese: 涡扇-13), codename Taishan, is a turbofan engine designed and manufactured by Guizhou Aircraft Industry Corporation to power the CAC/PAC JF-17 Thunder lightweight multirole fighter jointly developed by China and Pakistan, and in the near future the Shenyang FC-31 fifth-generation stealth fighter currently under development.