Specification for bevel protractors (mechanical and optical).
Wedi'i Gadw mewn:
Cyhoeddwyd: |
London :
British Standards Institution,
1951.
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Awdur Corfforaethol: | |
Fformat: | Llyfr |
EPS Library, Level 1, Standards Collection
Rhif Galw
Copi
Loan Type
Statws
Gwneud Cais
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