"In the worst case, the carrier cable may fail and the spare tire could become separated from the vehicle, a road hazard for following vehicles that increases the likelihood of a crash," it said.

“最坏的情况是，载波电缆可能会失效，备用轮胎就有可能从车上脱落，给后续车辆造成危险，从而增加了发生车祸的可能性。”报告中说。

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It is suitable for tire texture, high-spend conveyor belts, cable, shoes and other calendaring products.

使用广泛，适用于轮胎帘布层。高速输送带，电缆，鞋类及其他压延制品。

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The fixed pulley is rotated by a cranking bar to wind the steel cable, a spare tire can be lifted, and the spare tire can be put down stably by rotating in reversal the cranking bar.

使用摇把转动定滑轮圈绕钢丝索，即可提升备胎，反转摇把即可平稳降下备胎。

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