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。
2
And if the purple red: nonmagnetic as high manganese steel, magnetic usually usually steel or low-alloy steel.
而假如变紫红色：无磁性的为高锰钢，有磁性的通常为通常钢或低合金钢。
3
Chromium nickel stainless steel is usually non - magnetic in the annealed state, some of which are magnetic after cold working.