拱顶石;
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。
hot repair of arch-apex for glass tank
玻璃熔窑碹顶穿孔热修
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。
An arch with a pointed apex.
有一个尖锐的顶点的拱。
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