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![Old laboratory flask with ground glass stopperの写真素材 [30381104] - PIXTA](https://t.pimg.jp/030/381/104/1/30381104.jpg "Old laboratory flask with ground glass stopperの写真素材 [30381104] - PIXTA")
Old laboratory flask with ground glass stopperの写真素材 [30381104] - PIXTA
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Erlenmeyer flasks with ground glass stopper
