... ) semi-ball cock, cutout cock, ball core cock, anti-stone cock 3) train,railway ball cock1) material: stainless steel,copper,ron or as demand2) semi-ball cock, cutout cock, ball core cock ... for train,locomotive,railway since 1972, such as ball cock, anti-stone cock,ball core cock, cutout cock, copper valve, iron valve,stainless steel valve, machining ...