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Extension springs are a type of helical spring designed to resist stretching or pulling forces. Unlike compression springs, which resist forces along their axis, extension springs exert force in the opposite direction when pulled apart. Here's some information about extension springs:
Automotive: Extension springs are used in automotive applications such as trunks, hoods, and tailgates to assist in lifting and holding components in the open position.
Industrial Machinery: They are used in various industrial machinery and equipment for counterbalancing, tensioning, and returning mechanisms.
Garage Doors: Extension springs are commonly used in garage door systems to counterbalance the weight of the door and assist in opening and closing.