DURASTROKE

Oil refining machines; oil drilling machines; sludge pumps specially used for petroleum; drifting machines for oil wells; oil pump specially used for petroleum, namely, high-pressure pumps for use in oil or gas well hydraulic fracturing; floating or non-floating oildrilling rigs; machines and equipment for oil development and refinement, namely, oil pumping machines, oil refining machines; well cleanup machine; mine borers; industrial machine presses; hydraulic presses for metalworking; cutting machines; drilling bits for oil drilling machines; electric hand-held drills; hand-held pneumatic drills; compressed air pumps; hydraulic pumps; back pressure valves as parts of machines; compressed air machines; hydraulic and pneumatic components, namely, replacement parts for machines, namely, replacement parts for trench excavators, drag-line excavators, hoisting machines, locomotive cranes, shoveling machines, power shovels and log handling machines, namely, chassis parts, hydraulic and pneumatic parts

Extraction of oil and gas