test tube rack (physical) / support tube à essaie (physique)

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Test Tube Rack (Physical): A sturdy, multi-tiered device holding numerous test tubes upright and accessible, often used in laboratory settings for efficient organization and storage. Support Tube à Essaie (Physical): A robust, multi-level framework securely positioning multiple test tubes in an upright position, frequently employed within scientific laboratories to facilitate organized storage and easy access.