The bolt connecting pair is processed in factories, so the industrialization degree is high and the quality is more guaranteed.
由于螺栓连接副在工厂加工，故工业化程度高，质量更有保证。
The bolt connecting pair is processed in factories, so the industrialization degree is high and the quality is more guaranteed.
由于螺栓连接副在工厂加工，故工业化程度高，质量更有保证。
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