To observe the morphology of the collateral ligaments and gross measure the length of the ligaments in different angle of the elbow flexion. 观察肘关节副韧带的形态结构特点及大体观察肘关节不同屈曲角度时副韧带长度的变化。
In the judicial practice, collateral obligation of contract should follow principles as follows: closely relationship principle, principle of benefit measure, strictly limited principle. 司法实践中,合同附随义务的认定要遵循密切联系原则、利益衡量原则、严格限制原则。