孔眼

kǒng yǎn dà xiǎo bù yī yàng de shāi zi

孔眼大小不一样的筛子

screens with meshes of different sizes

rú guǒ yā lì guò dà kǒng yǎn huì pò liè

如果压力过大，孔眼会破裂。

If pressed together too strongly, the eyelet will crack.