Warning: file_put_contents(): Only 0 of 5517 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/www.30232.com/index.php on line 55 drain header是什么意思，drain header的翻译，drain header音标、读音、用法和例句_绍翊字体网有道词典
The low pressure header shall be brass and shall be near the panel floor with drain valves and tundishes piped to a drain. 低压力头应黄铜，并应靠近排水阀和中间包输送到一个排水板地板。