| 摘要 |
A doorway system, comprising a novel mechanism for controlling tall glass doors and making their installation and repair much easier, and a header that can be used with standard size or tall glass doors, is disclosed. The mechanism features circular bearings, a specially-designed bottom spindle and an upper, adjustable, pivotable housing. The header houses, among other parts, the adjustable housing and allows pre-cut, modular parts to be assembled at the building site.
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