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BS 4484-1:1969
Specification for measuring instruments for constructional works. Metric graduation and figuring of instruments for linear measurement (British Standard)
Form of graduation and figuring, in metric units, of rules, laths, squares, etc., and of steel pocket rules, tapes and bands, tapes in synthetic material, and land chains and levelling staffs. Some instruments are illustrated.
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British Standards Institution [bsi]
British Standards Institution [bsi]