They can be opened using a switch or key.

Such forms can be opened using Word as well.

It is normally closed and can be opened using a British Waterways key.

The airway can be opened using a chin lift or jaw thrust.

Another post office was opened at the railway station from 1884 using numeral 1392.

It could be opened using hydraulic actuators to load large items quickly.

The railway was opened in 1840 using horses to pull the slate trains.

Some of these lines had opened earlier using steam traction while electrification was still underway.

It may be opened using small doors, or a drawer that pulls out.

Until recently, the two leaves of the bridge were opened manually using levers by workers.