Ruler

Ruler-assisted isosceles trapezoid resection of skin of proximal shaft of penis for redundant prepuce;

直尺辅助下阴茎体近端皮肤等腰梯形切除术治疗包皮过长

Four methods, namely copy-weighing method, ruler method,Sinpusen formula method and digital image processing method,are adopted to measure the edible cactus leaf area and compared as well.

分别采用复印称重法、直尺法、辛普森公式法、数字图像处理法测定了食用仙人掌掌片面积并对几种方法进行了比较。