A machine used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations

A machine used to compact soil, gravel, concrete, or asphalt in the construction of roads and foundations

A machine that cleans the road

A machine that cleans the road

A conveyor comprising a series of closely spaced rollers set so that their crests can support articles to be conveyed. They may be power-driven, or freely revolving. Tapered rollers are used to form bends in the conveyor line.

A conveyor comprising a series of closely spaced rollers set so that their crests can support articles to be conveyed. They may be power-driven, or freely revolving. Tapered rollers are used to form bends in the conveyor line.

A physical object that is the outside upper covering of a house or other building or the ceiling of a room or other covered part of a house, building, etc.

A physical object that is the outside upper covering of a house or other building or the ceiling of a room or other covered part of a house, building, etc.

A cover intended to cover an outer roof.

A cover intended to cover an outer roof.

Part of the inside of a building that is divided from other areas by walls and a door and that has its own floor and ceiling.

Part of the inside of a building that is divided from other areas by walls and a door and that has its own floor and ceiling.

A mechanical cable that is a large stout cord of strands of fibres twisted or braided together.

A mechanical cable that is a large stout cord of strands of fibres twisted or braided together.

A variable area flow meter which consists of a tapered tube of glass with a float inside that is pushed up by flow and pulled down by gravity.

A variable area flow meter which consists of a tapered tube of glass with a float inside that is pushed up by flow and pulled down by gravity.

A positive displacement compressor in which compression displacement is effected by the positive action of rotating elements.

A positive displacement compressor in which compression displacement is effected by the positive action of rotating elements.

a positive displacement pump that consists of a chamber containing gears, cams, screws, vanes, plungers or similar elements actuated by relative rotation of the drive shaft or casing and which has no separate inlet and outlet valves.

a positive displacement pump that consists of a chamber containing gears, cams, screws, vanes, plungers or similar elements actuated by relative rotation of the drive shaft or casing and which has no separate inlet and outlet valves.

A 'well drilling system' and an 'artefact' in which the torque is transferred to the drill string using rotary table and kelly.

A 'well drilling system' and an 'artefact' in which the torque is transferred to the drill string using rotary table and kelly.

A detecting element that is intended to sense rotational speed.

A detecting element that is intended to sense rotational speed.

A router is a computer networking device that forwards data packets toward their destinations through a process known as routing. Routing occurs at layer 3 (Network layer) of the OSI seven-layer model.