| 摘要 |
The hook strips of the end frames are provided with slidable locking plates which retain an impaled fabric on the hooks of the hook strips. Each locking plate is movable from a position which permits impaling of the fabric on the hook strips to a position closer to the hooks of the hook strips in order to retain the impaled fabric in place. Each locking plate has projections with sharp points which pass through the fabric to enhance securement.
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