Movement 194
AnimatedOriginal 

194. Another mangle-wheel. In this the speed is equal in both directions of motion, only one circle of teeth being provided on the wheel. With all of these mangle-wheels the pinion-shaft is guided and the pinion kept in gear by a groove in the wheel. The said shaft is made with a universal joint, which allows a portion of it to have the vibratory motion necessary to keep the pinion in gear.

免费欧洲美女牲交视频_免费人成在线观看网站_免费岛国片在线观看x片喷水