词路径
- entity
- physical entity
- object
- physical object
- whole
- unit
- artifact
- artefact
- instrumentality
- instrumentation
- device
- reflector
下位词
- Cassegrainian telescope
- Gregorian telescope
- Herschelian telescope
- Maksutov telescope
- Newtonian reflector
- Newtonian telescope
- Schmidt camera
- Schmidt telescope
- coude system
- coude telescope
- mirror
- off-axis reflector
- parabolic reflector
- paraboloid reflector
- solar collector
- solar dish
- solar furnace