GB/T 33928-2017 往复式内燃机 排气消声器测量方法 声压法排气噪声声功率级和插入损失及功率损失比
文件大小 : 8.11 MB
文档格式 : PDF电子版
文档分类 : 国家标准
更新时间 : 2024-04-19 09:51:33
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/25/49/36/2549369.png): failed to open stream: operation failed in /www/wwwroot/0ppt.com/e/data/tmp/dt_temptext14.php on line 182