20 صفحه pdf
استاندارد وزارت نفت ایران
IPS-E-PR- 845:1996
ENGINEERING STANDARD FOR PROCESS DESIGN OF STEAM TRAPS
IPS-E-PR- 845:1996-ENGINEERING STANDARD FOR PROCESS DESIGN OF STEAM TRAPS
20 صفحه pdf
استاندارد وزارت نفت ایران
IPS-E-PR- 845:1996
ENGINEERING STANDARD FOR PROCESS DESIGN OF STEAM TRAPS