Portable grinding machine
FIG. 1 is a perspective view of a portable grinding machine showing our new design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a front view thereof; 
     FIG. 4 is a left side view thereof; 
     FIG. 5 is a right side view thereof; 
     FIG. 6 is a rear view thereof; and 
     FIG. 7 is a bottom view thereof.