A newly developed high efficient degreasing and rust removing solution for pre blackening treatment of highstrengthbolt is presented.
根据高强度螺栓发蓝工艺的独特性，研制适用工艺要求的常温除油除锈液，在生产中应用良好。
2
Fatigue of grid structure with bolt-sphere joints mainly behaves fatigue in joints, the critical of which is fatigue of highstrengthbolt.
螺栓球节点网架的疲劳主要是节点的疲劳，而节点的疲劳关键是高强螺栓的疲劳。
3
This paper discusses the application of calculation formulas of highstrengthbolt connection in bearing type under the action of both shearing force and axial tensile force.