| 单词 | under-board | 
| 释义 | under-boardn.  The lower of two boards forming an organ bellows or wind-chest. ΘΚΠ society > leisure > the arts > music > musical instrument > keyboard instrument > organ > 			[noun]		 > bellows > parts of under-board1781 rib1811 bellows-spring1852 bellows-tail1852 feeder1852 side rib1852 table1852 1781    Encycl. Brit. VIII. 5747/1  				[In] the church-organ..the sound-board..is composed of two parts, the upper board..and the under board. 1845    Stimpson Great Organ Birmingham 8  				Directly over the under-board is situated the upper-board, which is perforated with holes to correspond with those in the under-board. This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2022). < | 
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