| 31. | A newer model comes with an aluminum stiffener that protects the contents more effectively than the bag alone.
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| 32. | Round ducts, larger than in diameter ( 1 / 4 " plate ) require support ring stiffeners.
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| 33. | Smaller-diameter ducts may not require support ring stiffeners, but may be designed with saddle supports.
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| 34. | It's tempting to think it might be a stiffener, but the webs are all wrong.
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| 35. | Parlier and his crew damaged their mainsail by breaking and losing battens, the stiffeners that keep its shape.
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| 36. | The program comes in a large, multicolored box, inside which is the usual heavy cardboard stiffener box.
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| 37. | The cotton wick of a candle is woven around a narrow stiffener, which may be metal or paper.
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| 38. | It was usually hollow cast in blocks which were open in the back, with internal stiffeners called webbing.
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| 39. | It can be suspended over a rail, but it has stiffener batts which make it easier to climb.
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| 40. | Therefor bending stiffeners are not required, and round ductwork requires fewer and lighter intermediate stiffeners than rectangular ductwork.
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