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Mesh
Count
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Wire diameter (mm)
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Nominal aperture (mm)
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a
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-
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b
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-
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c
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d
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a
- acceoptable mean range of aperture
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b
- 6% apertures in this range unacceptable (mm)
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c
- line of apertures of this size is a 'major blemish' (mm)
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d
- no. of major blemishes acceptable in 10m2
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