GB/T 2546.1-2022 塑料 聚丙烯(PP)模塑和挤出材料 第1部分：命名系统和分类基础
文件大小 : 5.72 MB
文档格式 : PDF电子版
文档分类 : 行业标准
更新时间 : 2024-08-24 09:01:32
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/20/85/75/2085755.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182