impeller blade短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 叶轮片,动叶片 A new method of NC programming for impeller blade is introduced. It was proved that the method was very useful and credible by machining. The method improved the roughness and machining efficiency. 文章提出一种螺旋桨叶型数控加工编程新方法，通过实际加工证明其实用可靠，而且大大提高了表面加工质量和加工效率。 chemyq