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der Bass
☊
âm trầm
☊
☊
der Bassschlüssel
☊
khóa fa
☊
☊
der Bass ☊ 
âm trầm ☊ 
☊ der Bassschlüssel ☊ khóa fa ☊ ☊ der Bass ☊ âm trầm ☊ ☊ der Bassschlüssel ☊ khóa fa ☊ ☊