These are made of leather, with a small square projection that prevents the horse from arching its neck to suck in air.

它们是皮制的，方形的突出部分，能预防马弓着脖子吸进空气。

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The relation among the angles of femoral anteversion, neck-shaft and projection of femoral neck and shaft was researched by imitating. And its clinical significance was discussed.

本文用模拟的方法，对股骨的颈干投影角、颈干角和前倾角之间的相互关系进行了探讨。并对其临床意义进行了讨论。

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