To determine if a fully assembled cord, cord guard, or housing assembly has adequate strength to withstand repeated abusive flexing and to determine the failure mode if one exists.
目的是为了检验装配的电线、尾档和装配胶壳是否能承受外界反复的弯曲，并找出其失败的方式。
2
When the guard interval size and mode of the broadcasting signal are determined by one of the mode detectors, the arbitrator further terminates the operations of the other mode detectors.