| 摘要 |
The goggles comprise a frame 1, a translucent lens 2 and means of ventilation located on the upper part of the frame. These means comprise two ventilation cylinders 7, each being mounted rotatably about its axis in a cavity 6 with an open bottom made in the frame 1. Each cylinder 7 includes holes 12 distributed over a portion of its periphery, as well as fins 10 in the form of discs, between which the holes open out. This cylinder may thus be rotated in order to modify the number of holes 12 which produce a communication between the inside and the outside of the goggles and thus vary the air flow. <IMAGE>
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