The ornamental design for a two-part heat spreader, as shown and described.
FIG. 1 is an enlarged top plan view of a two-part heat spreader in conjunction with a compound microheater chip; the compound microheater chip forms no part of the claimed design.
FIG. 2 is a side view of a first part heat spreader shown separately for ease of illustration.
FIG. 3 is front view of a first part heat spreader.
FIG. 4 is a top view of a first part heat spreader.
FIG. 5 is an isometric perspective view of the bottom of a first part heat spreader.
FIG. 6 is a side view of a second part heat spreader shown separately for ease of illustration.
FIG. 7 is front view of a second part heat spreader.
FIG. 8 is a top view of a second part heat spreader.
FIG. 9 is an isometric perspective view of the bottom of a second part heat spreader; and,
FIG. 10 is a perspective view of a two-part heat spreader.