通常检验长度为200,500,1000毫米的游标卡尺,一般相应地采用№1,№8,和№9的长度块规组,为了同时在毫米的十分位的几点上检查游标刻度,(例如51.4或71.6)要把几块块规相研合成组合块来测量,即不是用全套块规。但块规研合要求高的准确性,实用性以及具备实验室的条件。而在长期的使用中,部份使用过的块规损坏了,结果,周期检定 Vernier calipers with lengths of 200, 500 and 1000 millimeters are usually inspected and the length block sets №1, №8 and №9 are generally used accordingly, in order to simultaneously check the vernier markings at several tenths of a millimeter (eg 51.4 or 71.6 ) Several blocks to be combined into a combination of blocks to measure, that is not a full set of block rules. However, the rules of the block research require high accuracy, practicality and laboratory conditions. In the long-term use, part of the used block gauge damaged, the results, the cycle test