TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Steel gate valves -Flanged and but-welding ends, bolted bonnets: API Standard 600
U1  - Caja 17 
PY  - 2021///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - NormalizaciÃ³n
KW  - Normas API
KW  - VÃ¡lvulas
KW  - RefinaciÃ³n
KW  - Piping
ER  -