无可见效应浓度
non-observed effect concentration(NOEC
无效自由度
passive degree of freedom
无源效率刻度
LabSOCS
LabS0CS
ISOCS
sourceless efficiency calibration
efficiency calibration without a radioactive source
BGP无效路由
invalid border gateway protocol(BGP) routes
NAND型闪存无效块
invalid block of NandFlash
包含无效字符
contains invalid characters