根据 JJG30—84检定规程要求,游标卡尺圆弧内量爪尺寸应在合格证书上加以注明。为使用方便最好将检定后的量爪的实际尺寸标注在量爪的适当位置上。本文介绍一种简便方法,用502胶封卡尺内量爪尺寸。具体做法如下:封标前先将卡爪预先在表面用汽油擦一下,然后用描图墨汁标出方框及卡爪实际尺寸 According to JJG30-84 test requirements, the caliper arc within the amount of size should be marked on the certificate. For the convenience of use, it is best to mark the actual size of the claw after verification in the proper position of the claw. This article describes a convenient way to use 502 gage calipers to measure the size. Specific practices are as follows: Seal the first jaw before the first surface with a petrol wipe, and then use the tracing ink to mark the box and the actual size claw