... ground distance relay || 接地距离继电器 ground echoes || 地面回波 ground effect || 地面效应 ...
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Norster will hope the move echoes the success of rivals the Ospreys who ground-share with Swansea City at the Liberty Stadium.
BBC: Cardiff teams agree ground share
It is able, from the delay between the broadcast of a pulse and its reception in different places, and the strengths of the echoes, to draw a three-dimensional picture of what lies under the ground.
ECONOMIST: Archaeology
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