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2SB1739 - / NPN Epitaxial Planar Silicon Transistors
2SB1731 - Low frequency amplifier
2SB1733 - PNP Middle Power Transistor
2SB173 - Ge PNP Alloy Junction Transistor
2SB1730 - General purpose Transistors
2SB1732 - Genera purpose Transistors
2SB1734 - Silicon PNP epitaxial planar type Transistor