Test sieves test sieve JIS Z 8801
The plate shall have a circular hole (circular) or a square hole (square) perpendicular to the metal plate. As for the arrangement of the circular holes, the angle formed by the straight line connecting the centers of the circular holes is 60 ° as shown in the figure, and the arrangement of the square holes is parallel or staggered as shown in the figure. In either case, the center distance of the sieves is the same.
Dimensions of cylindrical plate sieve frame