Pulleys are used to help lift many things. Lifts, window blinds and cranes often use pulley systems. Let’s change gear to look at gears. Gears are also wheels attached to a fixed axle ...

√ [TWO OPTIONS TO LIFT ITEM]: The Single-line:Lifting Weight is 220lbs,Lifting Speed: 33ft/min,Lifting Height is 38ft;The Double-line:Lifting Weight is 440lbs,Lifting Speed: 16ft/min,Lifting ...

The all-electric Super Jammer can handle heavy weights. It now wants to break the Guinness record. It has already proven that ...