The working principle of the wheat harvester cutting threshing and cleaning are multifunctional 

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Hello everyone I am your ”Encyclopedia Uncle” Rocket Uncle ~
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Through the description of natural science and social science knowledge outline the overall outline of the scientific knowledge picture!
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Science and Technology Culture-Technology And Culture: • 科技文化-Technology And Cu...
Life Science Popularization-Life Science: • 生活科普-Life Science
Animal Science-Animal: • 动物科普-Animal
Dry Goods Explanation: • 干货讲解
Planet Culture-Planet Culture: • 星球文化--Planet Culture
Gadgets: • 小玩意
Rocket Uncle Teach Science: • 火箭叔教科学
Astronomy-Astronomy: • 天文学--Astronomy
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Science Rocket Uncle# Science Popularization# Culture