Àn yīn kǒng (-)
original: 按音孔
Literal translation: 按: "(to) press"; 音: "sound / tone"; 孔: "hole": Each of the fingerholes.
张跃进 [Zhāng Yuèjìn]: 笙教学教程 [Shēng jiàoxué jiàochéng; Shēng teaching course], 北京 (Běijīng), 2012, p.3.
汉英词典 (Hàn Yīng cídiǎn) / A Chinese-English dictionary. 北京 [Běijīng], 1985, p.6, 826 & 392.