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Old men doing chemistry experiments. Holding flask and test tube in hands. Old scientist conducts experiments.

搜元素提供国外优质的免版权矢量素材资源免费下载，该资源的中文名称是：Old men doing chemistry experiments. Holding flask and test tube in hands. Old scientist conducts experiments.，英文名称是：Old men doing chemistry experiments. Holding flask and test tube in hands. Old scientist conducts experiments.，资源的分类是：手，该资源由网友上传，提供高速下载。