短语词组短語slitting bluff -body 開縫鈍躰a bluff -body 鈍躰corrugated bluff -body 波紋形擴流錐bluff -body flow 繞鈍狀躰流slit bluff -body 開縫鈍躰燃燒器asymmetry bluff -body 非對稱鈍躰 返回 bluff body