TW247955B - Keyboard instrument having hammer stopper outwardly extending from hammershank and method of remodeling piano into the keyboard instrument
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Keyboard instrument having hammer stopper outwardly extending from hammershank and method of remodeling piano into the keyboard instrument
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TW82110128A1992-06-051993-11-30Keyboard instrument having hammer stopper outwardly extending from hammershank and method of remodeling piano into the keyboard instrument
TW247955B
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