[国外标准] DIN 551-1986 Forged quenched and tempered after carburizing
[国外标准] JIS F7422-1996 Shipbuilding -- Forged steel 20K angle valves
[国外标准] JIS F7421-1996 Shipbuilding -- Forged steel 20K globe valves
[国外标准] JIS F7341-1996 Shipbuilding -- Forged steel 100K pressure gauge valves
[国外标准] JIS F7337-1996 Shipbuilding -- Forged steel angle air valves
[国外标准] JIS F7336-1996 Shipbuilding -- Forged steel globe air valves
[国外标准] JIS F7330-1996 Shipbuilding -- Forged steel 40K angle valves
[国外标准] JIS F7329-1996 Shipbuilding -- Forged steel 40K globe valves
[国外标准] JIS F5611-1996 Shipbuilding -- Forged steel 63K transparent type water gauges with valves for boiler
[国外标准] JIS F5610-1996 Shipbuilding -- Forged steel 20K reflex type water gauges with valves for boilers
[国外标准] JIS F5609-1996 Shipbuilding -- Forged steel 20K reflex type water gauges with cocks for boilers