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Modern method og grand pianoforte case construction

Modern method og grand pianoforte case construction.png C. P. R. grain elevator at Fort William, OntarioThumbnailsBack view of upright pianoforteC. P. R. grain elevator at Fort William, OntarioThumbnailsBack view of upright pianoforteC. P. R. grain elevator at Fort William, OntarioThumbnailsBack view of upright pianoforteC. P. R. grain elevator at Fort William, OntarioThumbnailsBack view of upright pianoforteC. P. R. grain elevator at Fort William, OntarioThumbnailsBack view of upright pianoforteC. P. R. grain elevator at Fort William, OntarioThumbnailsBack view of upright pianoforte

A. Continuous bent rim.
B. Wooden struts.
C. Iron shoe holding struts and connecting with iron plate.
D. Main beam.