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1·The microstructure, surface fracture morphology, hardness and tensile strength of the failed 45 steel connecting bolt were analyzed and tested.

对45钢连接螺栓断裂件的显微组织、断口形貌、硬度和抗拉强度进行了观察分析和测试。

2·2 bolt force in poor condition, and the basic chassis connecting bolt section with larger diameter and base section of standard section and connecting bolt diameter smaller.

螺栓受力状况不良，底架与基础节连接的螺栓直径较大，而基础节与标准节连接的螺栓直径较小。

3·The existence of reticulation and mass shape ferrite, decarbonization at the screw thread surface layer which induced decline of fatigue strength of connecting bolt were also…

此外，显微组织中网状、块状铁素体的存在以及螺纹表层脱碳使连接螺栓疲劳强度下降也是造成断裂的重要原因。

4·Through the failure analysis of connecting bolt of down rod, it points out that it is not correct to put the thinner nut outer side if the double nut anti-loose method is adopted.

通过对游梁式抽油机对接式连杆下接头连接螺栓的失效分析，指出了采用双螺母防松时，将薄型螺母放置在外侧是不恰当的。

5·Connecting bolts are arranged in the plugging conical points, and an anti-rotation key and an outer six-square sleeve which can realize the linkage are arranged on the screw bolt.

封堵内置有连接螺栓，螺栓上设有防转键及实现连动的外六方套。

6·This paper introduced a four-body contact model of steel crown-the nodular cast-iron skirt-piston pin-connecting bolt for the steel-crown aluminum-skirt composite piston of locomotive diesel engines.

本文以机车柴油机钢顶铝裙组合活塞为对象，建立组合活塞钢顶铝裙连接螺栓-活塞销的四体接触计算模型。

7·Bolt: Mechanical fastener, usually used with a nut, for connecting two or more parts.

螺栓：通常与螺母一起用于连接两个或更多零件的机械紧固件。

8·The fracture characteristics of bolt connecting the pedestal with slipway in a two-way moving slide valve was analyzed.

对双动滑阀装置上连接基座与滑道的螺栓在使用过程中发生的断裂进行了分析。

9·Flanges may be made by sections; joints shall be beveled and field welded; bolt holes of two connecting flanges must be drilled together.

法兰允许按箱体分段制作固焊；接头处打坡口，工地拼接；法兰板连接孔须两两配钻制孔。

10·When connecting flange, add sealing mat and lock connected bolt.

法兰连接时加密封垫后均匀锁紧联接螺栓。