| 31. | The frass is deposited in a thick broken central line.
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| 32. | It is used by Central line near its northern end.
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| 33. | The frass is deposited in a thin black central line.
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| 34. | It is whitish with a brownish central line of frass.
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| 35. | The frass is concentrated in a broad, irregular central line.
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| 36. | The frass is deposited in an irregular, broad central line.
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| 37. | The frass is deposited in a continuous brownish-black central line.
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| 38. | Some have a central line implanted to aid in the frequent administration of antibiotics.
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| 39. | A major delay occurred in getting clearance from Central Line.
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| 40. | The frass is deposited in a relatively broad central line.
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