The test has also proved that both types of immersion nozzles, one with five holes and the other "v"-shaped design are very effective in decreasing the penetration depths in moulds.

试验也证明了五孔和喇叭形伸入式水口是浇注方坯的两种好的水口形式，这两种水口对减小流股在结晶器内的穿透深度是十分有效的；