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。
The cartridge is also adapted to receive a plug to allow disposal of sharps.
筒也适于容纳塞子以允许处理锋利物。
The cartridge is also adapted to receive a plug to allow disposal of sharps.
筒也适于容纳塞子以允许处理锋利物。
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