中间体衍生化方法方法
intermediate derivatization method
4种方法提取液
four kinds of extraction solutions
交谈式通信进出方法
conversational communication access method
CCAM
水泥胶砂强度检验方法(ISO法)
method of testing cements-determination of strength-ISO 679
条件价值评估法CVM方法
Contingent valuation method CVM