What Is This: Chinese Stainless Steel Cylinder - Medical? Military?

[rcathey]

Picked this up at auction in a killer lot of old gun sights (Lyman and Redfield).

But this thing is just a mystery. The label is a bit tattered and stained so Google Translate wasn't able to get a great hold on it. From the few words that flashed up I'm confident it's Chinese and I think it's medical.

Measures 5-5/16" tall 3-15/16" in diameter.

The inside appears enameled in a dark brown color.

Any thoughts?

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