Thông số kỹ thuật Model SEM-50V SERM-50V P U M P Connection Dia 50 mm (2") In: 50 mm (2") Out: 50 mm (2") / 25 mm (1") Connection Thread Outer Pipe Thread Total Head 50 m (164 ft) 90 m (295 ft) Delivery Volume 500 L/min (132 USG/min) Max. Suction ...