| 单词 | under-hammer | 
| 释义 | under-hammern.  In a pianoforte: (see quot. 1860). ΘΚΠ society > leisure > the arts > music > musical instrument > keyboard instrument > stringed keyboards > 			[noun]		 > pianoforte > hammer hammer1774 under-hammer1840 1840    Penny Cycl. XVIII. 140/1  				The action of the square piano-forte, on its first introduction, consisted of a key, a lifter, a hammer, and a damper..Longman and Broderip..brought out a patented invention having two additional parts in the action, namely, the hopper, and the under~hammer. 1845    G. Dodd Brit. Manuf. 4th Ser. 160  				The key acts on the ‘grasshopper’, and the ‘grasshopper’ on the ‘under-hammer’. 1860    E. F. Rimbault First Bk. Pianoforte 396  				Under~hammer, a hinged lever..to which the hopper is adjusted; used in upright pianofortes. This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2022). < | 
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