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12. Automatic PCB Drilling Machine13. Automatic PCB layout printer with etching tank14. Pick and Place robot for PCB component placement15. Peso bill segregating machine with fake bills detector16. Digital Soil Test Kit ( measures acidity, alkalinity, phosphates, nitrates etc. ) Automatic PCB layout printer with etching tank thanks...for any replies..basically i-momodify mo yung inkjet printer preferrably EPSON kasi they use waterproof inks.. i am not familiar sa mechanical workings ng printer.. but yung carriage niya ang main problem dun since it can accept only very thin sheets, ang pcb ay makapal at hindi puwedeng ma-roll tulad ng paper.. once naka-print ka na sa PCB you can just run the PCB via a conveyor papunta sa etching tank na may bubbler tulad nung planong gawin ni sir marcelino, yung parang