| 摘要 |
Improvements which comprise a set of three small plates 20, 14, 17 forming an articulated compass for opening the wing 1 of the window by a specific angle, the system being controlled by the opening and closure handle 24 itself, in the orientation 24a, where a piece 22, fixed at the end of the rod 23 of the window closure rod ("cremona"), is moved into a position in which it connects with the shaft 21 of the small plate 14. <IMAGE>
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