permanent fault常: ordinary; common; normal发: hair故障: hitch; breakdown; stoppage; ...永久故障 永久性故障 常发故障: permanentfault初发故障: incipient failure下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:常发故障,即可在微信中查询翻译