equivalent failure rate当量: equivalent; equivalent weigh ...故障率: fault rate; failure rate测量故障: measure failure故障率: fault rate; failure rate◇故障率曲线 bathtub curve; 故障率数据 failure-rate data; 故障率水平 failure-rate level质量故障补救法: quality trounle shoot下载手机词典可随时随地查词查翻译