单项选择题 某计量技术机构为满足顾客和法律法规的要求，提高顾客的满意程度，通过一系列自我完善机制，以达到管理体系的持续改进，并确保其有效性。以下（）不属于该机构管理体系持续改进的自我完善机制

单项选择题 管内高速动车组旅客列车的车次范围（）

未知题型 过滤分离器filter separator 常用过滤方法及过滤机理Common filtration methods and mechanisms 表面过滤：固体污染物粒子碰撞而滞留在介体表面上而完成，过滤作用仅发生在表面上。能有效收集大于毛孔尺寸的粒子，不能收集比毛孔尺寸小的粒子。Surface filtration: solid contaminant particles collide and stay on the surface of the medium. Filtration occurs only on the surface. Can effectively collect particles larger than pore size, can not collect particles smaller than pore size. 深层过滤：固体污染物碰撞留在连续的毛孔的基体上而完成。过滤发生在介体表面以及整个厚度上。能收集部分比毛孔尺寸小的粒子。Deep filtration: the collision of solid contaminants is accomplished by remaining on the matrix of continuous pores. Filtration occurs on the surface of the medium and across the thickness. Can collect some particles smaller than pore size.