In TDG, diamond shaped safety marks used on packages and small containers to indicate what type of dangerous goods are inside. Also, in WHMIS, information regarding the contents, applied to containers and packages of controlled products.

Thin sheets of magnetic steel or iron that are used in armature and magnetic pole cores to reduce the production of eddy currents. The laminations increase the electrical resistance of the core material.

Refer to Local Area Network.

A metallic ring placed in a pump stuffing box that provides for the entrance of sealing and/or lubricating fluid to the packing.

Heat, added or removed, from a mass that will cause a change of state at a constant temperature.

The heat required to change a liquid to a vapour without change in temperature.

The heat quantity needed to convert a solid to a liquid without a change in temperature, i.e. 335 kJ/kg is the heat of fusion for ice.

The preparation and storage of a boiler that will be out of service for an extended period of time.

Lowest common multiple. The lowest number that is evenly divisible by a group of numbers.

A vertical drain line on multi-story buildings employed to drain storm water into the storm sewer system.

A device used to detect refrigerant leaks in a refrigerating system.

A solution of amine that has had the sour/acid gas removed.

Lower explosive limit.

Lower Flammability Limit - the minimum concentration of the refrigerant that is capable of propagating a flame through a mixture of refrigerant and air.

The initial ignition of fuel at boiler start-up.