Enlace original:
https://wedocs.unep.org//handle/20.500.11822/7916
United Nations Environment Programme
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[Manual for the refrigeration and air-conditioning technicians and engineers: post phase-out period of CFCs and beginning of phase-out of HCFCs]
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Manual for the refrigeration and air-conditioning technicians and engineers: post phase-out period of CFCs and beginning of phase-out of HCFCs