Zhongshan (中山) is a city in the south of the Pearl River[?] Delta in Guangdongprovince in China. The city was originally a county named in honour of Dr. Sun Zhongshan. Dr. Sun was born Sun Yat-sen in Cuiheng Village (翠亨村) of this place.
... to a smaller extent by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent ...