Milky Way. The Milky Way was once considered an ordinary spiral galaxy. Astronomers first began to suspect that the Milky Way is a barred spiral galaxy in the 1990s. Their suspicions were confirmed by Spitzer Space Telescope observations in 2005, which showed that the Milky Way's central bar is larger than was previously suspected.
CheshireBuilder New Member. The combi drill is a COMBInation of a hammer drill/sds/chizel and drill driver and the drill driver is designed simply for driving screws..ichiecatpugh New Member. previous post not strictly true :-. A drill/driver is just that-a drill with a torque control function which then allows it to be used in a controlled fashion for screwdriving. A combi drill is a drill/driver with the addition of hammer action which will allow drilling in masonry.
Pros of combi boilers. 1  a gas combi boiler system contains almost all components within the boiler itself, which makes the boiler system more compact and neater looking. 2  there's no need for a cold water or feed and expansion tank in the loft, and you can immediately get hot water heated on demand.his type of system will also usually require cold water, as well as feed and expansion tanks in the loft. With a heat-only boiler (also known as a conventional boiler system), the hot water is stored in a hot water cylinder or hot water storage tank.