混合构型组和全椎弓螺钉组在冠状面畸形和矢状面的平衡的矫形方面相似。
Hybrid constructs were comparable to all-screw constructs in the correction of coronal plane deformity and sagittal balance.
XM31A型机械密封为单端面、多弹簧非平衡型结构。采用传动螺钉传动。
Mechanical seal type XM31A has a single seal face and multi-spring unbalanced structure, and is driven by screw transmission.
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