{HEAD ~ The upper switch valve} 41 has {TAIL ~ a regulating recess} 411 defined at the bottom thereof, and the lower switch valve 42 is provided with a pair of arc hot/cold water inlet holes 421, 422 and a water outlet hole 423 thereon, correspondingly matched to arc hot/cold water inlet passages 401, 402 and a water outlet passage 403 of the valve mount 40 thereof 
{ HEAD ~ The upper switch valve } 41 has { TAIL ~ a regulating recess } 411 defined at the bottom thereof , and the lower switch valve 42 is provided with a pair of arc hot / cold water inlet holes 421 , 422 and a water outlet hole 423 thereon , correspondingly matched to arc hot / cold water inlet passages 401 , 402 and a water outlet passage 403 of the valve mount 40 thereof
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