拱顶石;
An arch with a pointed apex. make a sharp explosive noise.
有一个尖锐的顶点的拱。发出尖锐的爆炸的声。
Results: ( 1) The distance from the arch apex of anterior semicircular canal to the surface of the petrous was 2.19 mm. The posterior semicircular canal was the nearest to groove for the sigmoid sinus.
结果:(1)前半规管拱峰离岩骨表面(弓状隆起)较浅,平均深2.19mm。
An arch with a pointed apex.
有一个尖锐的顶点的拱。
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