American National Standard for ductile-iron pipe, centrifugally cast, in metal molds or sand-lined molds for gas - American National Standards Institute (New York, New York : American Gas Asociation, 1987)
Contenido: ANSI A21.52-1986
Revision de: ANSI A21.52-1981
Keywords: MAQUINAS HERRAMIENTAS; NORMAS; HERRAMIENTAS; DISEÑO