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。

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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。

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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。

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Stefansson sought the predisposing genes among Icelandic patients because their richly documented family trees and homogeneous genetic inheritance made the task as easy as looking for a needle in a box of needles.

FORBES: Profitable pedigree