permagn.清洁金属用粉permn.电烫发v.电烫（头发）permuted cyclic code排列循序码permutable hierarchy可置换谱系permeability to heat热的可透度permalloy pole plece坡莫合金极块permeability of soil土壤渗透性Permeability surface表面通透性permuted title index[计] 置换计数器permeabillzecl ceils透性化细胞permeability tensorr渗透张量permeation analgesia表面无痛法