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US09021740B2 Hinged rail for barrier operators 有权
轨道操作者铰链

Hinged rail for barrier operators
Abstract:
A movable barrier system wherein the trolley system comprises at least two guiding rail portions. At least one of the guiding rail portions is supported by a support member secured to the headroom area of the building support structure. The trolley traverses the at least two guiding rail portions by a hinged coupling device.
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