The collapse of a slender vertical element which has been subjected to compression, leading to a sudden sideways deflection.

Sawing felled trees into logs.

An excavating machine having a rotating wheel fitted with toothed-edged buckets; used to dig a layer of earth and load

A mechanical, buoyancy-operated steam trap which is designed to prevent steam from passing through the trap; makes use of an

A plumbing fixture whose basin is located near the floor so that it provides easy access to a water supply

An attachment for a materials-handling or excavating machine that digs or carries loose materials such as earth, gravel, stone, or