我在本刊曾发表过标准的标龄问题，发现ASTM和JIS标准的标龄最新，标龄在5年以内者占了很大比例，但没有那一个国家做到标龄均在5年之内。不过作为一个标准化团体，应争取使所有标准的标龄都在5半之内，否则可能影响某些领域的技术进步。要使一个标准体系有合格的标龄（5年以下 I have published in this issue of the standard issue of the standard age, ASTM and JIS standards found the latest age, the standard age of 5 years accounted for a large proportion, but none of the countries to achieve the standard age of 5 years Inside. However, as a standardization body, the standard age for all standards should be set within five and a half, or it may affect the technological progress in some areas. To make a standard system have a qualified age (5 years or less