10KV/20KV/35KV full voltage level heat shrink terminals and intermediate joints (including HSY-35-3.1 to 3.3 models), suitable for cable cross-sections of 50-400mm ², covering scenarios such as electricity, petrochemicals, and rail transit. IP68 waterproof (0.1MPa water pressure verification)+non-linear stress control (field strength ≤ 2.5kV/mm)+radiation cross-linked polyolefin insulation (dielectric strength ≥ 30kV/mm). Propane spray gun shrinks in 3 minutes, with an efficiency improvement of 65% compared to cold shrinkage technology; Weighing only one-third of the traditional porcelain terminal, it is suitable for small spaces such as switchgear and tunnels.