| 摘要 |
1487460 Reversible window L N AUSTNES 17 Dec 1975 [8 Jan 1975] 51549/75 Heading E1J A reversible window comprises a main frame 10 with trackways 15 in the jambs, a wing frame 11 with a pivot 14 slidable in the trackway, an arm 16 pivotably connected to the middle 18, 22 of the wing frame and at 19 to a slider in the trackway and a support arm 17 pivotably connected to the middle of the main frame 20, 23 and to the middle 21 of the arm 16. The window can pivot to a ventilating position or reverse for cleaning. |
