Abstract
Describes three patterns using round (circular) and square perforations. The sizes of holes range down to 2 mm for square holes and to 0.5 mm for round holes. Five ratios of pitch to hole are specified which result in nominal open areas ranging from about 60 % to 23 %.
General information
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Status: PublishedPublication date: 1987-12Stage: International Standard confirmed [90.93]
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Edition: 1Number of pages: 5
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Technical Committee :ISO/TC 24/SC 8ICS :73.120
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