金属或铝制的轻便梯子应当装防滑凳。
Portable metal or aluminium ladders should be equipped with non-skid feet.
梯子脚底是否有很好的止滑垫片。如金属梯子脚底的橡胶，延伸梯的防滑垫片。
Ladder feet are in good condition, e. g. rubber tips on metal rolling ladders. "Safe-Hi" feet on extension ladders.
该APC40，配有坚固的金属底盘和防滑橡胶细节。
The APC40 is built with a rugged, metal chassis and slip-proof rubber detailing.
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