The sparecable or control cable that is normally not loaded with current shall be placed at the center in case of multi-layer laying.
多层敷设时,平时不载流的备用电缆或控制电缆应放置在中心部位。
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"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.
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.