Unha is North Korea's one and only orbital class rocket. It partially utilizes the same delivery system as the Taepodong-2 long-range ballistic missile.
Any other rocket
Maximum Lift Capacity to various orbits. LEO stands for Low Earth Orbit and GTO stands for Geostationary Transfer Orbit.
Payload fairing is the nose cone used to protect payload against the impact of heat & pressure during launch.
Kwangmyŏngsŏng 3 & 4
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