gapless ZnO arrester with silicone rubber sleeve for 110kV AC system
gapless ZnO arrester with silicone rubber sleeve for 220kV AC system in 9°C alpine regions
gapless ZnO arrester with silicone rubber sleeve for 35kV AC system in 9°C alpine regions
series resistor（patent for utility models）
750KV AC EHV outdoor bar-shaped porcelain support insulator（patent for utility models）
ZnO arrester with silicone rubber sleeve for 500kV transmission and transformation lines
