Warning: file_put_contents(): Only 0 of 6234 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/201990.com/index.php on line 55 steam valve bonnet是什么意思，steam valve bonnet的翻译，steam valve bonnet音标、读音、用法和例句_耀久九英英词典
Valve body and bonnet are separated by diaphragms in order to prevent valve parts, such as bonnets and steam from corrasion; 阀体与盖被中间隔膜隔开，使得隔膜上方的阀盖，阀杆等零件不受介质侵蚀；