Wind power generating facility adopting union valve copper alloy flange piston shock absorption
Welding valve zinc alloy piston buffered sea wind power generation instrument
Tungsten-manganese alloy threaded spring offshore oil well power-assisted system
Offshore well power assisting device with chromium and manganese alloy welding springs
Nickel-manganese alloy flange spring offshore oil well power assistance device
Flanged valve chromium alloy union spring sea wind power generation platform
Copper alloy offshore oil well power-assisted device achieving threaded piston shock absorption
Auxiliary zinc alloy welding piston buffer offshore oil well machinery
Aluminium alloy steel flange piston damping offshore oil well power-assisted equipment