Boolean operations短语⁸⁴³²⁰⁺⁸ 基本例句 布尔运算原型booleanoperation的复数 Through abstracting the structure of shafting parts, the system defines basic graphic units and realizes the characteristic modeling of shafting parts through Boolean operations on graph units. 系统对轴系零件结构进行抽象,设定了轴系单元基本体素等,通过特征拼合实现了零件的特征造型。 cnki