Pin hole bolt ruptures under its service.
销孔螺栓在服役期限内发生断裂。
Yong Feng Gang, Dongguan City, Union metal products Factory specialized in producing automatic lathe, CNC lathe parts, metal axle pin, bolt, brass nuts and other metal products.
东莞市凤岗永盟五金制品厂专业生产加工自动车床件，数控车件，五金轴销，插销，铜螺母等五金产品。
The bolt fastening metal structure of tower crane and pin structure without deformation, no weld crack.
塔吊的紧固金属结构的联接螺栓和销轴，结构件不得有变形，焊缝不得有裂纹。
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