The Well-Tempered Clavier, Book II, BWV 870-893 - J.S. Bach: The Well-Tempered Clavier, Book II, BWV 870-893 - Fugue No. 18 in A-Flat Minor, BWV 887 (该井平均律，第二册，作品870 - 893 - 第十八升G调赋格A3)