According to another aspect of the present invention, an adjustable wedge block is provided to limit {TAIL ~ the tilting angle} of the control lever so as to confine the maximum output volume of {HEAD ~ water} 
According to another aspect of the present invention , an adjustable wedge block is provided to limit { TAIL ~ the tilting angle } of the control lever so as to confine the maximum output volume of { HEAD ~ water }
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 HEAD HEAD HEAD HEAD HEAD