DE183173A - - Google Patents

Info

Publication number
DE183173A
DE183173A DE183173A DE 183173 A DE183173 A DE 183173A DE 183173 A DE183173 A DE 183173A
Authority
DE
Germany
Prior art keywords
hammer
lever
sheet
music
contact pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
Other languages
German (de)
English (en)

Links

Family

ID=

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