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structured observation
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structured observation
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structured observation
结构观察
一种社会调查研究方法,指在严格规定和控制下进行的观察,也称系统观察。
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electromagnetic purification of molten metal
electromagnetic radiation
electromagnetic radiation emitting receiver
electromagnetic radiation, EMR
electromagnetic radiation management
electromagnetic radiationpollution prevention and control law
electromagnetic radiation safety standards
electromagnetic radius
electromagnetic recoil separator
electromagnetic reconnaissance perception
electromagnetic relays
electromagnetic resonant cavity
electromagnetic riveting
electromagnetics
electromagnetic scattering
electromagnetic screening
electromagnetic sensor
electromagnetic sensors
electromagnetic separation
electromagnetic shielding
electromagnetic shielding composites
electromagnetic shielding fabric
electro-magnetic shielding in building
electromagnetic shower
electromagnetic signal simulator
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