贵阳地铁1号线刚性悬挂采用的是汇流排水平方向机械预弯最小半径是m

An area within coverage of Inmarsat geostationary satellites.
B. An area, excluding sea area Al, within coverage of Medium Frequency （MF） coastal radio stations in which continuous DSC alerting is available.
C. An area within coverage of VHF coast radio stations in which continuous DSC alerting is available.
D. The extreme polar regions

A group of ship stations.
B. A vessel operating in sea area A3.
C. A coast station.
D. A vessel