单词	back siphonage preventer
释义	back siphonage preventer vacuum breaker vacuum breaker A backflow preventer which prevents a vacuum in a water-supply system from causing backflow.
随便看	army operational test & evaluation agency army operations center army operations group army operations maintenance shop army operations research symposium army ordnance missile command army organic air defense army organization army otter caribou association army overseas service association army package power reactor army packaging board army participating test unit army part number army performance oriented review & standards army performance oriented review system army personnel command army personnel letter army personnel newsletter army personnel recovery army personnel research office army personnel transformation directorate army petroleum center army photo interpretation unit army physical disability appeal board

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。