Easily wiped window capable of being arbitrarily turned over
An easily wiped window capable of being arbitrarily turned over is characterized by comprising a window frame (1) and sashes (2); the middle portion of each margin frame (4) of the window frame (1) is movably hinged with the middle portion of a stile (5) of each sash (2) through a concentric rotary...
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Format: | Patent |
Sprache: | chi ; eng |
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