1)four-way plug valve,四通旋塞阀2)four way plug valve,四通塞阀3)four way cock,四通旋塞4)three-way plug valve,三通旋塞阀5)round way cock,通海旋塞，通海阀6)Lining T-Cock Valves,衬里三通旋塞阀
用法例句
Compare with four way cock and four way ball valve in the longitudinal inclination balance control system;