The ornamental design for a circulardiscmagneticstirrer, as shown and described.
FIG. 1 is a top and side perspective view of a first embodiment of a circular disc magnetic stirrer in a housing of the present invention;
FIG. 2 is a top view of the circular disc magnetic stirrer in a housing of FIG. 1;
FIG. 3 is a bottom view of the circular disc magnetic stirrer in a housing of FIG. 1;
FIG. 4 is a right side perspective view of a circular disc magnetic stirrer in a housing of the present invention of FIG. 1; and,
FIG. 5 is front and back side view of the circular disc magnetic stirrer in a housing of FIG. 1.
The broken lines in the figures shown structure or boundaries for illustrative purpose only and are not part of the claimed design, but rather show the environment in which the design is associated, or show portions of the article in which the design is embodied or applied to that are not considered part of the claimed design. The broken lines shall form no part of the claimed design.