常见例句雙語例句Valve body and bonnet are separated by diaphragms in order to prevent valve parts, such as bonnets and steam from corrasion;閥躰與蓋被中間隔膜隔開，使得隔膜上方的閥蓋，閥杆等零件不受介質侵蝕； 返回 steam valve bonnet