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rohit
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Begginer
Asked: 2024-08-26T15:53:50+05:30 In:

The frame size is designated by a number which is its centre height expressed in mm.

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    2 Answers

    1. rohit
      Begginer

      Answer: a

      Explanation: The IEC 72 lists a coherent range of main dimensions with the central

      heights ranging between 56-1000 mm. The frame size is designated by a number which

      is its centre height expressed in mm. The frame designated 180 has a centre height of

      180 mm.

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    2. prasanjit
      Teacher

      Answer: a
      Explanation: The IEC 72 lists a coherent range of main dimensions with the central
      heights ranging between 56-1000 mm. The frame size is designated by a number which is its centre height expressed in mm. The frame designated 180 has a centre height of 180 mm.

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