сонячний цикл, цикл сонячної діяльності
solar-powered helmet radio
solar energy-propelled rocket
solar gas engine
solar photon rocket engine
orbital solar power plant
solar activity
solar eclipse
solar energy
solar equator
solar radiation
solar sail
solar wind
solar drone
solar-powered drone
solar power system
basic cycle
crisis life cycle
cycle
cycle of operation
diesel cycle
four-cycle / four-stroke
intelligence cycle
launch cycle
life cycle
life cycle cost (LCC)
life cycle costing (LCC)
life cycle management (LCM)
Life Cycle Management Group (NATO)
life cycle support (LCS)
pumping cycle
reload cycle
respiratory cycle