Chemicals, Caterpillar equipment and parts, Photosensitive printing plates, Pistons, water heaters, cotton labratory analysis equipment, valves, flat glass,cigarette filter tow, A/C compressors, stainless steel pipe and fittings, aluminum, mining equipment and supplies, pressure vessels
Just to name a few with which I have day to day experience.
I worked for Caterpillar until retiring 10 years ago. Back then roughly 50% of product was exported. The entire world economyy is down now, thanks in large part to Chris Dodd and Barney Frank and so is Caterpillar's business, the percentage is probably about the same though.
If we ever get rid of this communist administration and congress, I expect all businesses to rebound.