滤线栅铅条会聚线到栅板的垂直距离称为A.栅焦距B.栅比C.栅密度D.栅距E.周长

作者: rantiku 人气: - 评论: 0
问题 滤线栅铅条会聚线到栅板的垂直距离称为
选项 A.栅焦距 B.栅比 C.栅密度 D.栅距 E.周长
答案 A
解析 :滤线栅铅条会聚线到栅板的垂直距离称为栅焦距,滤线栅栅比是铅条高度与铅条间距之比,栅密度是单位距离内的铅条数,没有栅距和周长的概念。

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