bar magnetic compass
常見例句
- 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..
他在一根垂直的針頭頂點，設(shè)置了一根水平的鋼制細棍，它可以左右轉(zhuǎn)動，就像羅盤里的磁針那樣。 返回 bar magnetic compass