O-ring push-pull pipe joint
O-ring-less low profile fittings and fitting assemblies
Ocean floor riser connection
Off-set welding ring
Offset coupling for electrical conduit
Offset nipple
Offset plastic flange for connecting toilet bowls to drain pipes
Offshore method
Offshore structure and method
Oil cooler mounting unit for automatic transmission
Oil cooler with improved coolant hose connection
Oil field tubular connection
Oil field tubular connection
Oil nozzle lock device
Oil or gas field casing
Oil well pipe joint
Oil well pipe joint and manufacturing method therefor
Oil well pipe screw joint, and threading method and...
Oil well pipe threaded joint
Oil well tool with packing means