GB/T 34834-2017 声学 环境噪声评价中脉冲声事件暴露声级分布的计算方法
文件大小 : 2.91 MB
文档格式 : PDF电子版
文档分类 : 行业标准
更新时间 : 2024-08-11 14:53:37
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/26/46/71/2646714.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182