垂直强迫振动
vertically forced oscillation
forced vertically oscillation
等强直螺纹
uniform strength straight threads
uniform strength
straight thread
地磁垂直强度
magnetic vertical intensity
关节强直
ankylosis
Tempor omandibular joint
Temporomandibular joint ankylosis
Ankylosis of temporomandibular joint
Joint ankylosis
arthrokleisis