International Maritime Satellite-B System 国际海事卫星B站 International Maritime Satellite-C System国际海事卫星C站 International Maritime Satellite-E System 国际海事卫星E站 ..
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?国际海事卫星
...国际海事卫星 international maritime satellite-a system; international maritime satellite-b system; international maritime satellite-c system; international maritime satellite-e system; international maritime satellite-m system; technical requirements of inmarsa...