英语词汇back up safety device怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	back up safety device
释义	back up safety device 简明释义备用安全装置网络释义 1 ?备用安全装置 ... back up safety device 备用安全装置 up roll device 弯辊装置 up safety device 备用安全设备 ... 短语 1 back-up safety device 备用安全装置 ; 备用安全设备
随便看	logstandard deviation Log, station. log steaming log stop log storage log-stretch trick log strip log-structured log subtraction LOGSUP log up log survey LOGSVC logsys log table log table log tally log tape write ahead log task log, timber log time log to log token log tool log trailer

英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。