You can develop your project '''either''' in the inner space between the bottom and the top boards.
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You can develop your project:
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* '''either''' in the inner space between the bottom and the top boards.
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* '''either''' using smaller spacers to develop your project in the inner space {{underline|and}} also the outer space.
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'''either''' using smaller spacers to develop your project in the inner space {{underline|and}} also the outer space. This is made possible thanks to the through holes and the labelling the both sides of the boards.
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Outer space can also be used thanks to the through holes PCBs and the labelling the both sides of the PCBs.