Manual control valve for anesthetic gases
FIG. 1 is a side elevation showing the left side of my design, which elevation is a mirror image of the right side. 
     FIG. 2 is a plan view of the top of my design. 
     FIG. 3 is an elevation showing the front of my design. 
     FIG. 4 is an elevation showing the rear of my design. 
     FIG. 5 is a plan view of the bottom of my design. 
     FIG. 6 is a perspective view showing the top, front and left side of my design.