Sunshine QJ-Y-2-35, Инструкция по эксплуатации

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2.3 Security design description
2.3.1 Hydraulic system adopts hydraulic cylinder to lift. Explosion-proof valve is
used to hydraulic cylinder. Once hydraulic oil pipe explode, damage will not
happen because of lift suddenly goes down.
2.3.2 Steel rope is adopted to the balancing installation to ensure synchronous
lifting.
2.3.3 Lift mechanical lock is unlock and does not work when goes down. But it
works in rest state. So it is safe even when the oil pipe burst or steel wire rope
broken.