![In-a-science-laboratory,-a-scientist-is-applying-a-reacting-solution-on-a-pipette-then-inserts-it-into-a-test-tube](https://videocdn.cdnpk.net/videos/cdb39feb-aede-4e5a-83f0-1ffe1e5787ea/horizontal/thumbnails/small.jpg)
In a science laboratory, a scientist is applying a reacting solution on a pipette then inserts it into a test tube
1080p 00:30
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