Perhaps you should try some spelling variations:
"electric double base transistors" » "electric double mos transistors", "electric double des transistors", "electric double power transistors", "electrical double base transistors", "electric dipole base transistors", "electric double a transistors", "electric double one transistors", "electric double bass transistors"
"electric double base transistor" » "electrical double base transistor", "electric dipole base transistor", "electric double mos transistor", "electric double a transistor", "electric double one transistor", "electric double bass transistor"

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