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介绍一种避孕环透视测量尺青海省邮电职工医院李克俭育龄妇女避孕环透视是一种常规ｘ线检查方法，透视时从荧光屏上目测环的位置、形态大小，一般误差较大。某些文献介绍的节育环测量尺其制做比较麻烦。现介绍一种简单易做的避孕环透视测量尺。制做：将直径１．３ｍｍ左右...
Introduction of a contraceptive ring fluoroscopy ruler Qinghai Provincial Post and Telecommunications Staff Hospital Li Kejian Women of childbearing age Contraceptive ring fluoroscopy is a routine X-ray examination method, perspective from the fluorescent screen ring position, shape size, the general error is larger. Some literature describes the birth control ring measuring scale its system to do more trouble. Now introduce a simple and easy to make perspective of the contraceptive measuring ruler. System to do: the diameter of about 1.3mm ...