counter for injection ampoules
Specialized counter used in medical or pharmaceutical contexts for ampoules or vials. Not a general counter for cylindrical objects.
This medicine contains 5 milliliters per ampoule.
Pour the liquid into the glass cylinder.
The kanji 筒 originally depicts a bamboo tube. The reading とう is the on'yomi, used in compound words.
chimney · kiseru; Japanese smoking pipe
feeder tube; chlorine feeder tube · cartridge; ammunition cartridge
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grenade launcher