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color classification:
JCDQ90G blank board (without any components) 5-element block JCDQ90G finished board without operational amplifier 18 element block JCDQ90G NE5534? KOA resistor assembly finished board 22 yuan block JCDQ90G NE5534 DALE resistor assembly finished board 25 yuan block JCDQ90G OPA445? KOA resistor assembly finished board, 48 yuan block JCDQ90G OPA445? DALE resistor assembly finished board 50 yuan block LG-316D finished power board 45 yuan block JCDQ90G assembled with American OPA604 operational amplifier 50 yuan block LG-5L? Double bridge rectifier positive and negative 15V voltage stabilizing finished board 36 yuan block LG-5K double bridge rectifier positive and negative 15V voltage stabilizing finished board 39 yuan block LG-5M double bridge rectifier positive and negative 15V voltage stabilizing finished board 39 yuan block
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