In 2001, 602001, 68 % of African rhino horse horns entering illegal trade were recovered.
2001年, 68%进入非法贸易的南非犀牛角被发现.
网络文摘精选
A practical case a horse in chess by reverse engineering and NC technology was given.
最后描述了采用逆向工程技术进行国际象棋的棋子———马从模型到成品零件数控加工的实例.
网络文摘精选
