Pipeline repair method and apparatus
Pipeline tap and connecting device
Pipeline weld repair cap
Pivotally mounted fuel collector
Plug
Plug cock
Plug mechanism for wellhead tool
Plug valve
Plug valve
Plumbing apparatus
Plumbing tool
Plumbing tool and method for repairing a pipe therewith
Plumbing tool and method for repairing a pipe therewith
Pollution control device
Port closure apparatus for differentially pressured vessels
Ported gate valve
Power transmission
Pressure balance device for use in a faucet
Pressure control valve
Pressure equalization valve and technique for shaft furnace