nouns
a solid bounded by a cylindrical surface and two parallel planes (the bases)
is a type of (narrower)
a three-dimensional shape
a surface generated by rotating a parallel line around a fixed line
is a type of (narrower)
a shape that is curved and without sharp angles
a chamber within which piston moves
a cylindrical container for oxygen or compressed air
is a part of
a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus
is a type of (narrower)
any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)