whereby, the position of said lower stop on said front side of said valve housing is adjusted so as to control rotation of said flap inside said hollow space, thereby adjusting {HEAD ~ the water flow} through {TAIL ~ said clearance} when said toilet bowl is refilled 
through
whereby , the position of said lower stop on said front side of said valve housing is adjusted so as to control rotation of said flap inside said hollow space , thereby adjusting { HEAD ~ the water flow } through { TAIL ~ said clearance } when said toilet bowl is refilled
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH