... magnetic needle compass 磁针罗盘 dry magnetic compass card 干罗经盘 steering magnetic compass 操舵磁罗经 ; 驾驶磁罗经 ...
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On the point of an upright needle he laid horizontally a fine steel bar, which could turn to the right and left like the magnetic needle in a compass-box..
他在一根垂直的针头顶点，设置了一根水平的钢制细棍，它可以左右转动，就像罗盘里的磁针那样。
The iron in the ship caused a deviation of the magnetic needle of the compass.
这块在船上得铁引起罗盘磁针的背离。
The needle of a magnetic compass points to the magnetic North Pole.
磁性罗盘上的指针指向北方磁极。
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