渤海湾海陆风辐合线
Sea-land Breeze Convergence Line
渤海湾海上油田
Bohai Bay offshore oil fields
渤海海冰
temperature in the Bohai sea
sea ice
ICE
sea ice in the Bohai Sea
Bohai Sea ice
渤海海域
Bohai offshore
bohai bay
bohai sea
regularity of gas-generation
the Bohai Sea
offshore Bohai
Bohai sea area
Bohai offshore area
dual certificate system
offshore part of the Bohai Bay Basin
Bohai Sea waters
渤海湾北岸
northern coast of Bohai Bay
渤海湾滨海平原
coastal plain of the Bohai Gulf