标准更新方式分类及其数值模拟研究——以中国稀土标准体系为例
魏凤, 钟永恒, 江洪, 潘懿

Study on Standard-updating Classification and Its Numerical Model——Based on Rare Earth Standard System in China
Wei Feng, Zhong Yongheng, Jiang Hong, Pan Yi
图2 中国稀土行业标准更新分类情况