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理论抽样
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理论抽样
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theoretical sampling
理论抽样
一种有选择性的、系统的、技巧性的资料收集方法,通过对资料的比较来产生理论。
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superconducting critical magnetic field
superconducting critical temperature
superconducting current
superconducting cyclotron
superconducting detector
superconducting electrical technology
superconducting electromagnetic sail propulsion
superconducting electronic properties
superconducting electronics
superconducting energy gap
superconducting energy storage
superconducting fault current limiter
superconducting field effect transistor
superconducting film
superconducting filter
superconducting fluctuation
superconducting flux transformer
superconducting galvanometer
superconducting gap
superconducting glass
superconducting gradient meter
superconducting gravimeter
superconducting gravity gradiometer
superconducting high gradient magnetic separation
superconducting hot electron bolometer
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