The best vantage point for understanding behavior is from the internal frame of reference of the individual.

Its gears and internal frame are made of Delrin.

Most modern sacks have internal frames, designed to fit the shape of the back.

The buildings, which recall the early medieval long houses, were originally relatively small and had an internal wooden frame.

The internal frames may be made of steel, but more likely titanium or magnesium.

"You took the internal frames and partitioning into account?"

No reason in theory why the wings shouldn't be load-bearing plywood on internal frames like the body.

It was attached directly to the Bolo's internal frame at each rib.

No.10's construction revealed that the boat was built from the outside in, there was no internal frame.

This is held in place firmly by a flexible internal frame.