What is T-Slot Aluminum Framing, and How do Engineers Use It?

I am designing a frame with T-Slot extruded Al which has several types of connection fixtures These can be T-Nuts, T-Bolts, Gussets etc and

t slot aluminium extrusion T Slot Aluminum Extrusion Wellste has many t slotted framing accessories for aluminum profile framing system There are

aluminum extrusions tslot Aluminum T-Slotted Framing Rails, Tslot-Aluminum-Extrusions, Find Details and Price about Aluminum Extrusion Profiles Aluminum Extrusions

aluminum extrusion t slot This T-Slotted frame with black T-Slot covers and casters is being used for mobile white board How cool!