Classification and regional evaluation of collapsed loess in gansu 甘肃省湿陷性黄土的分类与区域评价
2.
Those enterprises that enter the above mentioned blocks for petroleum prospecting ( at the stage of regional assessment and prospecting stage ) before chinese - foreign cooperative blocks are publicized shall retreat from such blocks after chinese petroleum companies have concluded contracts with foreign enterprises 对外合作区块公布前,已进入该区块进行石油勘查(尚处于区域评价勘查阶段)的企业,在中方石油公司与外国企业签订合同后,应当撤出。