Question: What is a car scissor jack?
Answer: It's a kind of jack,which be used to lifting a car for fixing.
The Longman Dictionary defines a jack as a piece of equipment which is used to lift and support a heavy weight, such as a car. Jacks are the primary tool used when changing the tire of a car in a roadside emergency. The car jack which is used as original equipment in modern cars is the scissor jack. It is designed to lift the weight off the wheel which needs service, such as changing a flat tire.
Jack(device), A jack is a mechanical device used as a lifting device to lift heavy loads or apply great forces. Jacks employ a screw thread or hydraulic cylinder to apply very high linear forces.
A mechanical jack is a device which lifts heavy equipment. The most common form is a car jack, floor jack or garage jack which lifts vehicles so that maintenance can be performed.
More powerful jacks use hydraulic power to provide more lift over greater distances.
But mechanical jack like car scissor jack has more stable features.
Mechanical jacks are usually rated for a maximum lifting capacity (for example, 1 tons,1.5 tons or 2 tons).
Actually scissor jack is more portable than hydraulic jack,it can be carried on a car very convenient,more reliable,less breakdown.
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