A.實(shí)際膠質(zhì) B.十六烷值 C.閃點(diǎn) D.自燃點(diǎn)
①建立客戶(hù)數(shù)據(jù)庫(kù); ②制定客戶(hù)維護(hù)制度; ③客戶(hù)的業(yè)務(wù)維護(hù); ④客戶(hù)的客情維護(hù).