GB/T 39694-2020 氢化丙烯腈-丁二烯橡胶(HNBR) 通用规范和评价方法
文件大小 : 809.91 KB
文档格式 : PDF电子版
文档分类 : 行业标准
更新时间 : 2024-08-23 15:55:35
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/28/04/52/2804520.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182