HVDC technology is used to transport electrical power over long distances with low losses using underground or submarine cables.

HVDC技术利用地下或者海底电缆，用于远距离的电力传输，而损耗较低。

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The Seawolf submarine, the C-17 transport aircraft, several different air-to-ground and air-to-air missiles are in the cross-hairs.

CENTERFORSECURITYPOLICY: Center for Security Policy | FOR A CREDIBLE DEFENSE POSTURE IN THE FUTURE, INVEST IN THE B-2 TODAY

The French transport ministry has said that the ship Ile de Sein, which is equipped with a remotely-operated submarine, will leave Cape Verde on 21 April to begin retrieving parts of the wreckage.

BBC: Air France crash: Tail section found on Atlantic seabed