Geocentric not with the vertical surface of the Earth.
说明地心不垂直与地球表面。
The disadvantages in the prior art that a chain can be curled by winding the shaft only in the vertical surface and can not be bent on the horizontal plane is overcome;
克服现有技术中链条只能在垂直面内绕轴卷曲,不能在水平面内折弯的缺陷;
The most common types of universal grinding machine grinder, Cylindrical grinder, Internal grinder, vertical surface grinder. Horizontal surface grinder and Centerless grinder.