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Modern method og grand pianoforte case construction

Modern method og grand pianoforte case construction.png Jonas Chickering’s full solid cast grand metal plateThumbnailsJewish ShopharJonas Chickering’s full solid cast grand metal plateThumbnailsJewish ShopharJonas Chickering’s full solid cast grand metal plateThumbnailsJewish ShopharJonas Chickering’s full solid cast grand metal plateThumbnailsJewish ShopharJonas Chickering’s full solid cast grand metal plateThumbnailsJewish ShopharJonas Chickering’s full solid cast grand metal plateThumbnailsJewish Shophar

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