随动补偿片，铰接在操纵面后缘(副翼，方向舵，升降舵)的可动部。
BALANCE TAB, a small hinged moveable part on the trailing edge of a control surface (aileron, elevator, rudder).
youdao
结论：平片能显示多数腰椎后缘软骨结节。
Conclusion: LPMN can be mostly showed by radiography.
应用推荐
模块上移
模块下移
不移动