采用一把螺丝刀从凹槽中拆卸螺旋阀座定位器环。
A screwdriver is used to remove the spiral seat retainer ring from its groove.
目的：观察针刀治疗环枕筋膜挛缩的近期临床疗效。
Objective: to observe the clinical effect that the acupotomy cured contracture of the post, atlantooccipital membrane.
目的：观察针刀治疗环枕筋膜挛缩的近期临床疗效。
Objective: to observe the clinical effect that the acupotomy cured contracture of the post, atlantooccipital membrane.
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