osition;Rotation;Rotational directions;Rotational motion;Safety engineering;Tridimensional;Viewing conditions;Viewing direction【摘要】: 【中国标准分类号】: A25【国际标准分类号】: 13_180【页数】: 52P;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |