| 41. | Today, it is common to see both a door-knocker and an electric doorbell.
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| 42. | This is a business of knockers.
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| 43. | _Beware of door-knockers.
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| 44. | The brass door knocker is polished.
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| 45. | Roberts is one of the shortest knockers in golf, but also one of the straightest.
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| 46. | The door knocker came from Nuremberg.
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| 47. | The presence of pork-knockers in the Guyanese interior has upset traditional Amerindian life there.
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| 48. | A gilded bronze door knocker,, is made in the shape of a beast head.
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| 49. | Ravens quarterback Trent Dilfer has called Super Bowl XXXV a " slobber-knocker ."
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| 50. | Above the knocker, there are panes of glass, some broken and others opaque with age.
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