Conclusions When the angulation of healed long bone shaft fracture at lower limbs exceeds the physical weight bearingline, the condition should be treated surgically.
结论下肢长骨干骨折后成角愈合超过生理负重线基本条件后应手术治疗为好。
2
Gerardus Mercator's projection, published in 1569, was immediately useful because it depicts a line of constant bearing as a straight line, which is handy for Marine navigation.