Definitions for "MAIN FRAME"
The top, side jambs, and the sill make up what is often called the main frame of the window. This is the part of the framework that is attached to your home and holds the glass panels or sash.
The combination of rafters and columns that support the secondary framing members and transfer loads directly to the foundation.
The head, sill and jambs sections of a window.
computer that is the heart of a network of computers or terminals which allows hundreds of people to work at the same time on the same data. It requires a special environment - cold and dry.