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农作物 101 天文学 95 astronomy & astrophysics; physics 94
植物保护 73 Physics 63 physics 59
天文学::天体物理学 42 天文学::天体物理学::高能天体物理学 38 天文学::星系与宇宙学 35
昆虫学 30 Astronomy & Astrophysics 24 农业基础科学 21
植物学 20 天文学::射电天文学 13 经济学 13
农学(农艺学) 12 畜牧、动物医学、狩猎、蚕、蜂 12 Astronomy & Astrophysics; Physics 10
园艺 10 天文学::天体物理学::实测天体物理学 8 Chemistry 7
Biochemistry & Molecular Biology 6 Plant Sciences 6 plant sciences 6
天文学::恒星与银河系 6 物理学 6 空间物理 6
管理学 6 考古学 6 Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy 5
agronomy 5 其他学科 5 分子生物学 5
半导体器件 5 天文学::星系与宇宙学::星系天文学 5 金属有机化学 5
天文和天体物理 4 核科学技术 4 430 3
Cell Biology 3 Evolutionary Biology 3 Genetics & Heredity 3
Materials Science 3 Mycology 3 Physics, Multidisciplinary 3
Science & Technology - Other Topics 3 cell biology 3 endocrinology & metabolism 3
化学工业 3 天文学::恒星与银河系::恒星天文学 3 材料科学 3
矿床地质 3 遗传学 3 Biotechnology & Applied Microbiology 2
Chemistry, Multidisciplinary 2 Ecology 2 Environmental Sciences 2
Oncology 2 Pharmacology & Pharmacy 2 Toxicology 2
agriculture 2 biotechnology & applied microbiology 2 engineering; mathematics 2
genetics & heredity 2 soil science 2 中国文学 2
人文、经济地理 2 光学理论研究 2 农业工程 2
半导体材料 2 半导体物理 2 历史学 2
地层学与地史学 2 天文学::天文学其他学科 2 数理科学和化学 2
林业 2 法学 2 物理学::高能物理学 2
物理科学和化学 2 环境科学 2 等离子体物理::等离子体物理与核聚变研究 2
415.1 Metal Structural Materials;421 Strength of Building Materials; Mechanical Properties;536 Powder Metallurgy;931.2 Physical Properties of Gases, Liquids and Solids 1 537.1 Heat Treatment Processes;544 Copper and Alloys;549 Nonferrous Metals and Alloys;933.1 Crystalline Solids 1 539.3 metal plating;641.2 heat transfer;714.2 semiconductor devices and integrated circuits 1
601.3 Mechanisms 1 615.2 solar power;701.1 electricity: basic concepts and phenomena;721.3 computer circuits;933 solid state physics 1 701.1 Electricity: Basic Concepts and Phenomena;712.1 Semiconducting Materials;714.2 Semiconductor Devices and Integrated Circuits;813.1 Coating Techniques;931.2 Physical Properties of Gases, Liquids and Solids 1
702 Electric Batteries and Fuel Cells;803 Chemical Agents and Basic Industrial Chemicals;804 Chemical Products Generally;804.1 Organic Compounds;821.4 Agricultural Products;913.3 Quality Assurance and Control 1 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics 1 714.2 Semiconductor Devices and Integrated Circuits;804.1 Organic Compounds;804.2 Inorganic Compounds;933.1.2 Crystal Growth;813.1 Coating Techniques;931.1 Mechanics;931.3 Atomic and Molecular Physics;913.4 Manufacturing;712.1 Semiconducting Materials;708.4 Magnetic Materials;408.2 Structural Members and Shapes;544.1 Copper;546.2 Tin and Alloys;547.1 Precious Metals;549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals;708.2 Conducting Materials 1
741.1.2 Fiber Optics 1 761 Nanotechnology 1 801.4 Physical Chemistry 1
802.2 Chemical Reactions 1 802.3 Chemical Operations;801 Chemistry;741.3 Optical Devices and Systems;741.1 Light/Optics;712.1.1 Single Element Semiconducting Materials;641.1 Thermodynamics;461 Bioengineering and Biology 1 804 Chemical Products Generally 1
804.1 Organic Compounds 1 804.1 Organic Compounds;815.1.1 Organic Polymers;931.2 Physical Properties of Gases, Liquids and Solids 1 813.1 Coating Techniques 1
813.2 Coating Materials 1

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