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New system for fixing in the sleeve, the posts of iron, serving as supports for tents shelters of markets uncovered (model of the town of paris) or for another use, by applying the principle of the helicoidal ramp
New system for fixing in the sleeve, the posts of iron, serving as supports for tents shelters of markets uncovered (model of the town of paris) or for another use, by applying the principle of the helicoidal ramp