History

Time	Change
2013-07-20 07:23:22+00:00	Created
2013-07-20 07:23:22+00:00	Associated with 第二輔助集
2013-07-20 07:23:22+00:00	Associated with G2
2013-07-20 07:23:22+00:00	Associated with GB2
2013-07-20 07:23:22+00:00	Associated with GB/T 7589-1987
2013-07-20 07:23:22+00:00	Associated with GB 7589
2020-10-10 06:33:16+00:00	Associated with GB/T 7589-87
2020-10-10 06:33:16+00:00	Associated with GB/T 7589