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。

Objective To compare the Safety box with the Needle cutter about the advantages and disadvantages in the safe injection area.

目的比较截针器和安全盒在保证安全注射方面的利弊。

Needle sets we look for are in flat, round plastic box and contain about 30 needles.

我们所寻购的针要求装在平整的圆形的塑料盒里，并且每一盒要装30支针。