The periphery of {HEAD ~ the arc hot/cold water inlet} holes 421, 422 and the water outlet hole 423 of the lower switch valve 42 thereof are defined by {TAIL ~ indented groove seats} 4211, 4221, 4231 respectively, correspondingly matched to higher protruded walls 4011, 4021, 4031 defining the arc hot/cold water inlet passages 401, 402 and the water outlet passage 403 of the valve mount 40 thereof respectively 
The periphery of { HEAD ~ the arc hot / cold water inlet } holes 421 , 422 and the water outlet hole 423 of the lower switch valve 42 thereof are defined by { TAIL ~ indented groove seats } 4211 , 4221 , 4231 respectively , correspondingly matched to higher protruded walls 4011 , 4021 , 4031 defining the arc hot / cold water inlet passages 401 , 402 and the water outlet passage 403 of the valve mount 40 thereof respectively
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH