The refilling hole and the air hole are different. Take out the rubber plug or tear film when use cartridge.

注墨口与进气孔采用不同出口，使用墨盒时请取出进气口胶塞或撕掉胶膜。

Any tear, crack, or hole in the cone will cause distortion in the sound.

锥形物上的任何破损、裂缝或孔洞，都会造成声音失真。