Isbn: 9787552558159 - 宁夏建筑用砂矿产地质勘查技术规程(db64t1755-2020)/宁夏回族自治区地方标准者_宁夏回 (1 risultati)

paperback. Condizione: New. Paperback.Pub Date:2021-03-01 Pages:15 Language:Chinese Publisher:Sunshine Publishing House This regulation stipulates the objectives and tasks of sand mineral exploration for construction. the degree of exploration research and exploration control. exploration work and quality requirements. and feasibility evaluation work and mineral resource reserve estimates. This regulation is applicable to the exploration of construction sand minerals within the jurisdiction of Ningxia; it can be used as.…