jxycn
2025-08-11T12:10:32+00:00
GB/T 18411-2018虽然是推荐性国标,但也是国标吧
[img]https://img.nga.178.com/attachments/mon_202508/20/axwdQ2w-bc9dZbT1kShs-12j.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202508/20/axwdQ2w-bc9dZbT1kShs-12j.jpg[/img]