国产一级淫一区二区波多野结衣_日韩无码免费一级片_国产日韩欧美主播视频在线播放_乱伦无码免费综合_成全视频高清免费观看_国产三级成人第一_久久亚洲aⅴ永久无码精品_电影免费在线观看日本_人妻内谢精中文字幕_天堂亚洲欧美在线中文

Contact Us

220V Cooling Fan of the invention

Date: 2015-6-4   Click: 1279 Times

"220V Cooling Fan" originated in 1830, a man named James Byron was inspired by American watches from the structure, the invention can be fixed on a ceiling, with a spring-driven mechanical fan. This fan blades rotate slowly bring cool people feel cool, but have to climb the ladder to the winding, very troublesome. In 1872, a Frenchman named Joseph has developed a turbo start by clockwork, gear drive chain means mechanical "220V Cooling Fan", a mechanical fan the fan than Byron more sophisticated invention, use is also convenient . In 1880, the first time the Americans Shule blade mounted directly on the motor, connect the power supply, the rapid rotation of the blades, cool breeze blowing, which is the world's first "220V Cooling Fan".

Back to: Industry news

+86-0769-83660708

Home Product News Contact