| 41. | A black cloth is required to keep stray light out while observing the image on the ground glass focusing screen.
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| 42. | Ground glass joint ( or ground glass stoppers ) are commonly used with laboratory glassware, mainly because of their nonreactivity.
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| 43. | Ground glass joint ( or ground glass stoppers ) are commonly used with laboratory glassware, mainly because of their nonreactivity.
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| 44. | Stopcocks are a smooth tampered plug or rotor with a handle, which fits into a corresponding ground glass female joint.
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| 45. | The stopcock is a smooth tampered plug or rotor with a handle, which fits into a corresponding ground glass female joint.
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| 46. | The apparatus consists of an electric heater with a digital thermostat and two or more bulbs connected with ground glass joints.
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| 47. | The ground surface of the barrel moves freely within the ground glass surface of the syringe chamber with very little friction.
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| 48. | Sodium hydroxide is also mildly corrosive to glass, which can cause damage to glazing or cause ground glass joints to bind.
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| 49. | A petite, elegant woman who favored high heels and silk, Lederer had delicate features and a voice of pure ground glass.
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| 50. | In medicine, " Orphan Annie eye " ( empty or " ground glass " ) papillary carcinoma of the thyroid gland.
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