The first module of the ISS was launched into space in 1998 and the initial construction of the station took about two years to complete. Human occupation of the station began on November 2, 2000. Since that time, the ISS has been continuously occupied.
rimfire. ( 1 of a cartridge) having the primer in a rim encircling the base. Compare center-fire (def 1). ( 2 of a firearm) designed for the use of such cartridges.
A centerfire cartridge is a cartridge with a primer located in the center of the cartridge case head. Unlike rimfire cartridges, the primer is a separate and replaceable component. Centerfire cartridges have supplanted the rimfire variety in all but the smallest cartridge sizes.