GB/T 2481.2-2020 固结磨具用磨料 粒度组成的检测和标记 第2部分:微粉
文件大小 : 622.96 KB
文档格式 : PDF电子版
文档分类 : 国家标准
更新时间 : 2024-04-18 15:33:49
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/28/70/76/2870769.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182