TY  - BOOK
ED  - American Petroleum Institute, API
TI  - Reconditioning of metallic gate, globe, and check valves: API Recommended Practice 621
U1  - Caja 18-B 
PY  - 2010///
CY  - Washington
PB  - American Petroleum Institute, API
KW  - Válvulas de seguridad
KW  - Normalización
KW  - Normas API
KW  - Válvulas
ER  -