GB/T 41979.4-2022 搅拌摩擦点焊 铝及铝合金 第4部分:焊接工艺规程及评定

文件大小 : 3.74 MB

文档格式 : PDF电子版

文档分类 : 行业标准

更新时间 : 2024-08-15 15:00:46


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/20/05/78/2005784.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182