Do you have experience in transportation?
There are countless items such as machinery, cars, garments, chemicals, food, perishables, etc. Additionally, there are many regulations such as BIS, ITAR, OFAC, etc. to contend with. All shipping companies aren’t proficient in handling all of these combinations. So ask your shipping company about the experience they have in your particular type of shipment. A reputed company will bring up several examples of similar shipments they handled for their customers.