The external circular surface of the circular type base plate is fixedly provided with at least two rolling wheels by a frame anchor ear.
圆型基板外圆周面上通过一框架抱箍固定设置至少二滚轮。
The shape of the articular surface of the cervical zygapophyseal joint could be divide into circular-type, ellipse-type which is the most one in each segment, and irregular-type.
颈椎间关节关节面的形态可分为圆型、椭圆型和不规则型，各节段均以椭圆型占优势。
The shape of the articular surface of the cervical zygapophyseal joint could be divide into circular-type, ellipse-type which is the most one in each segment, and irregular-type.
颈椎间关节关节面的形态可分为圆型、椭圆型和不规则型，各节段均以椭圆型占优势。
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