... 90 degree Angle valve in the corner of the shape, so called Angle valves, Angle valves, folding ... machined and electroplating and assemblyAngle valves classification ofTriangle valve cold heat two (in blue, red marks distinguish) ... same, heat and cold, mark, main is to distinguish which is hot water, which is cold water.Angle valves ... more can only according to the calculation. cold hot water angle valve