GB/T 39963-2021 立井冻结法凿井井壁应用C80~C100混凝土技术规程

文件大小 : 8576.44 KB

文档格式 : PDF电子版

文档分类 : 国家标准

更新时间 : 2023-12-19 11:22:37


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/61/11/18/61111805.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182