man scientist wearing white protective gloves and glasses holding yellow chemical solution inside erlenmeyer

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Man scientist wearing white protective gloves, and glasses is holding a yellow chemical solution inside an Erlenmeyer Royalty Free Stock Photo

Man scientist wearing white protective gloves, and glasses is holding a yellow chemical solution inside an Erlenmeyer

Male scientist wearing white protective gloves, mask and glasses is holding a yellow chemical solution inside an Royalty Free Stock Photo

Man scientist researcher, wearing white protective gloves, mask and glasses, is holding a yellow chemical solution Royalty Free Stock Photo

Man scientist wearing white protective gloves, and glasses is holding a yellow chemical solution inside an Erlenmeyer flask in a laboratory, vertical portrait. Science and medicine.