Adjective
Acting or operating in two directions or with both motions; producing a twofold result; as, a double-acting engine or pump.
Source: Webster's dictionaryBy 1783 the Watt steam engine had been fully developed into a double-acting rotative type, which meant that it could be used to directly drive the rotary machinery of a factory or mill. Source: Internet
Following steam engine practice some manufacturers made double-acting two-stroke and four-stroke diesel engines to increase power output, with combustion taking place on both sides of the piston, with two sets of valve gear and fuel injection. Source: Internet
Rear drum brakes are typically of a leading/trailing design (for non-servo systems), or primary/secondary (for duo servo systems) the shoes being moved by a single double-acting hydraulic cylinder and hinged at the same point. Source: Internet
When submerged it was propelled by two Brown, Boveri & Cie (BBC) GG UB 720/8 double-acting electric motors giving a total of convert at 322 rpm. Source: Internet
Otherwise these trunk engine pistons bore little resemblance to the trunk piston; they were extremely large diameter and double-acting. Source: Internet
Steam piston engine A labeled schematic diagram of a typical single-cylinder, simple expansion, double-acting high pressure steam engine. Source: Internet