基本解释[經濟學]制動器放氣閥词组短语短語service brake bleed valve 行車制動器排放閥automatic brake bleed valve 自動制動器放氣閥parking brake bleed valve 停放制動器放泄閥oil cooled brake bleed valve 油冷式制動器泄放閥brake bleed valve更多词组专业释义經濟學制動器放氣閥