00581nam a2200181 a 450000100080000000500110000800800410001910000190006024501240007926000780020330000100028165000200029165000260031165000140033765000260035165000100037765000120038710011492014-02-22       1987    bl uuuu     u00u1 u    #d1 aBLIESNER, R.D.  aDesigning, operating and maintaining piping systems using PVC fittingsba handbook of design guidelines and precautions  aVirginia (USA): PVC Fittings Division of the Irrigation Associationc1987  a14 p.  aEQUIPO DE RIEGO  aINGENIERIA HIDRAULICA  aPLASTICOS  aPOLICLORURO DE VINILO  aRIEGO  aTUBERIA