| 31. | Hang gliders are composed of rigid frame from which the fabric skin is attached, much like a triangular sailboat sail.
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| 32. | These are thin flexible sheets of gelatin or plastic which must be held in rigid frames to prevent them from sagging.
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| 33. | This gives a rigid frame with few tubes and very little body weight that does not contribute to the frame stiffness.
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| 34. | The rigid frame created by the concrete box cells made the structure 60 percent longer than any such bridge previously constructed.
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| 35. | These have a rigid frame or an enveloping box that holds a camera at a fixed position over a copy board.
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| 36. | The extremely rigid frame and strong wheel bearings prevent the torsional forces caused by this dragging motion from damaging the machine.
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| 37. | The bikes bear a passing resemblance to those used for speedway, but have a longer wheelbase and a more rigid frame.
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| 38. | By 1939, when the sprung heel and rear swingarm frames had begun to appear so rigid frames had seen their day.
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| 39. | Haubert built a prototype using his own rear suspension design that closely followed the look of the earlier Harley rigid frames.
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| 40. | Within the rigid frame of the studio floors, it serves as a metaphor for the inevitable tension between individual and collective life.
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