| 41. | These were issued imperforate and with year and invoice number, with or without district name.
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| 42. | Over the years, other sheets have been released and include both perforated and imperforate sheets.
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| 43. | The imperforate, heavy, solid, thick shell has a conoidal shape and is elevated.
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| 44. | The body shows a thin coat of enamel, the umbilical region slightly impressed but imperforate.
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| 45. | The first " centro de hoja " were the imperforate Cuban patriots issues of 1926.
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| 46. | The wall finely agglutinated, imperforate; aperture, two alternating rows of pores on the periphery.
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| 47. | The malformations include chondrodysplasia ( improper growth of bone and cartilage ), genitalia, and imperforate anus.
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| 48. | For collectors all four were also printed in small numbers without die cuts, and so were imperforated.
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| 49. | The solid, imperforate shell has a depressed-turbinate shape with a diameter greater than the altitude.
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| 50. | However, using tampons may be difficult or impossible for those with untreated vaginismus or an untreated imperforate hymen.
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