A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

A metal pin by which the plating and other parts of iron and steel vessels are joined. Rivets are known by their heads, such as: Flush, pan, snap, plug, tap, countersunk, mushroom, and swollen neck.

Ethyl alcohol (C2H5OH)

A type of lamp that produces light from sodium gas contained in a bulb operating at a partial pressure of 0.13 to 1.3 Pascal. The yellow light and large size make them applicable to lighting streets and parking lots.

When reciprocating compressors run, the moving parts such as pistons, rods, crossheads, connecting rods are repeatedly accelerated and retarded. These velocity changes set up pulsating inertia forces. The forces are of the first and second order. The firs ...

The lower yard on a mizzen mast of a square-rigged ship.

Leaning out over the side of the boat to to counteract heel and balance it.

(1) A small wooden cask in which grog was carried. (2) A type of marine steam reciprocating engine where two engines were used together on the same propeller shaft.

A method of controlling a wind turbine's speed by varying the orientation, or pitch, of the blades, and thereby altering its aerodynamics and efficiency.

The purchase by a listed company of its own shares either in the open market or by tender offers..

Graduated fixed stake used in regions of abundant snowfall to facilitate the measurement of snow depth.

A hand held pneumatic tool. Designed for light demolition work, digging, making holes etc.

Waste water from a household source other than a toilet. This water can be used for landscape irrigation depending upon the source of the greywater.

Turning off or disconnecting loads to limit peak demand.

(FOOTSIE)An index of the share prices of the 100 largest companies (by market capitalisation) in the UK.

A small buoy that is used to mark the position of an anchor. It is attached to the base or crown of an anchor and can be used to recover the anchor if it has to be cast adrift, or to trip it if it becomes wedged.

When a boat has two separate fins, instead of a centerboard or keel, they are referred to as bilge boards.

The horizontal movement of the water due to tide

A concrete pad that sits on gravel or crushed rock, well-compacted soil either level with the ground or above the ground.

Various statements that the U.S. government requires to be displayed on export shipments. The statements specify the authorized destinations.