During the routine maintenance of a section of the contact network of the Beijing-Shanghai High-Speed Railway, engineers found a batch of special "small objects" that were more than 10 years old - plastic cable ties. These seemingly ordinary white straps of plastic cable ties are still firmly fixed after long-term exposure to wind, sun, rain and snow, and their insulation performance and mechanical strength have not weakened. This discovery amazed the on-site technicians.
2025-04-07
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