permil千分率(‰)
permn.电烫发v.电烫(头发)
Permafrost thermal thawing sensitivity冻土热融蚀敏感性
permeability frequency characteristics磁导率频率特性
permeability resistance of chloride ion抗氯离子渗透性
permanetnt magnetic system for undulator波荡器永磁系统
Permeability - effective stress relation渗透性-有效围压关系
perm-selective ion-ex-change membrane选择透过性离子交换膜
perma-nent magnet linear synchronous motor永磁直线同步电动机