... its service life is longer than ordinary carriers 8 times, 4, Absolute trackless: without dragging mark, no damage to any ... Features: high-class, beautiful and durable. D, Mute trundles: wheel frames adopt special nylon plus various components.Features: corrosion resistance, high ... shape test:In rated load condition, covered 10 kilometers with 4 kilometers per hour, the caster wheel rubber should not ...