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一、引言2015年上半年的三篇文章先后介绍了国际上三维模型定义(MBD)的发展动态(本刊第二期),以及民用和军用领域的两个成功案例:通用电气电力和水力部门制定了三步走战略(本刊第四期);美国海军航空作战中心Lakehurst飞机分部估计一年节约经费2100万人民币(本
I. INTRODUCTION Three articles in the first half of 2015 introduced the development of the international definition of 3D models (Issue 2) and two success stories in civil and military areas: the General Electric Power and Hydraulic Developed a three-step strategy (Issue 4); Lake Navrst Aircraft Division of the U.S. Naval Air Operations Center estimates an annual savings of 21 million yuan