The formation in midfield was heavily criticised, but in reality it was the defensive end that showed the breakdown. Was it all related to fatigue?
中场的阵型饱受批评，但实际上确实防守一端出现了漏洞。这也和疲劳有关么？
2
The disconnection between computer and workstation of MTS810. 25T fatigue testing machine is described. Meanwhile, the breakdown reasons are analyzed and repair plan are set down.
The fatigue life for hybrid rolling ball bearing is researched on the base of its breakdown mechanism and fatigue life of steel bearings. Its fatigue life formula is given.