One type of garage door opener is the chain driven system

Source: Ningbo Heng Yuan Wang Plastic Co., Ltd.  author:   Time: 2013-05-31

If you are in the market for something reliable and easy, this may be the option for you. Chain driven systems are the most common type of opener. They function using a metal chain that pulls the door along a track. These systems are the least expensive and offer tremendous reliability. If you are installing a system of doors at your business and you are not tremendously concerned with the level of noise, this could be a good option for you. These types of lifts function in all kinds of different weather and can take much wear and tear. If you are looking for an affordable opening option that is reliable and has a proven track record, a chain driven system may be for you.

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lottery scratcher, key chain
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