Symbol of Preservation - 搜索图片

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researchgate.net
State of preservation of the icon. | Download Scientifi…
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symbolsandmeanings.net
Protection Symbols Throughout The World: The Extensive List
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Food Preservation - Importance, Objectives, and Methods - GeeksforGeeks
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biologyexams4u.com
10 Methods of Food Preservation with Example | Food Microbiology

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