The ornamental design for a mainbody for built-in oven range, as shown and described.
1. Main body for built-in oven range
1.1 is a front perspective view of a main body for built-in oven range:
1.2 is a front view thereof;
1.3 is a back view thereof;
1.4 is a left view thereof, where the right view is a mirror image;
1.5 is a top view thereof;
1.6 is a bottom view thereof; and
1.7 is a bottom perspective view thereof.
The dash-dash broken lines depict portions of the main body for built-in oven range that form no part of the claimed design. The dash-dot broken lines define the boundary of the claimed design and form no part thereof.