求翻译：主要使用游标卡尺、千分尺、环规、塞尺、斜度测量仪、漏光检测仪等量具检测活塞环的环高、径厚、闭口间隙、斜面环斜度、桶面环桶面度、锥面环锥度、圆度、外观等工艺指标。是什么意思？

Mainly use a Vernier caliper, micrometer, ring, examiner, angle measuring instrument, measuring tools such as detection of piston ring of light leakage detector loop height, diameter and thick, closed gap, beveled sides ring-tilt, barrel drums, cone ring of taper, roundness, appearance, and so process indicators.