GB/T 20975.8-2020代替 GB/T 20975.8一2008 铝及铝合金化学分析方法第8部分∶锌含量的测定
文件大小 : 664.6 KB
文档格式 : PDF电子版
文档分类 : 国家标准
更新时间 : 2023-12-12 14:39:58
Warning: get_headers(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182
Warning: get_headers(): Failed to enable crypto in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182
Warning: get_headers(https://img.0ppt.com/61/11/54/61115447.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182