Congenital vertebral anomalies, including butterfly, block, and transitional vertebrae, and hemivertebrae, are a collection of malformations of the spine in animals.
先天性脊柱畸形，包括蝴蝶椎、脊椎分节不全、椎骨移行、半椎等，指犬只各脊柱骨的形成异常。
2
Play great positioning pin ensures disc not because butterfly plate gravity drop, also can be installed in the valve stem end adjustment block to ensure that the butterfly plate fixed position.