They were provided with either two or three sets of hand operated dual sliding doors per carriage side.

Both sets of professionals may operate as though nothing mattered but their mission, narrowly conceived.

Each set has its own leader and generally operates independently from the others.

She once said, "A theory is nothing more than your set of systematic hunches about the way things operate.

One set operates with a Z car and five S cars as its whole consist.

This set operated for most of the inter-war period, being withdrawn in April 1938.

One set operates when in the station and the other when the train is underway.

The set used 20 valves and operated at 12 Kv.

An additional set of seven sites were operate in urban areas.

When the set is operating on the same channel as the camera, it will show what the camera sees.