| 摘要 |
A system for wiping a windshield includes a pivot shaft rotatably connected to a source of oscillatory rotation. The system also includes an arm for positioning a wiper blade against the windshield. The wiper blade forms an angle of inclination with respect to a normal to the windshield. Gears connected to the pivot shaft and to the arm provide reversal of the angle of inclination when rotation of the pivot shaft reverses.
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