graded impurity concentration
... graded band gap 缓变禁带 graded impurity concentration 缓变杂质浓度 graded junction varactor 缓变结变容二极管 ...
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graded impurity absorption
... alumed band gap 缓变禁带 graded impurity absorption 缓变杂质浓度 graded alliance 缓变结 ...
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