Gambell involved a grant of oil and gas leases covering tracts offshore of Alaska.坎贝尔一案涉及到阿拉斯加近海岸的一片油气田的租借权问题.The changes will lead to more flexible leases, and leases nearer to 15 years than the present norm of 25 years...
在丙酮、丁二酮水溶液中采用化学氧化法合成 纳米 聚苯胺, 并研究有机溶剂的含量对纳米聚苯胺导电性能的影响.The nano - was synthesized through the chemical oxidation method in an solution of acetone or diacetyl, separately.以氯化锌为路易斯酸催化剂,探讨了2 ─ 亚甲基─1 ─ 苯基 ─ 1.3 ─ 丁二酮与1.3 ─ 环戊二...