How large of an object can print using 3d printer?

is the material of 3d printer expensive?

what is the most important part of 3d printer?

what are the main problems with 3d printer?

Is there a limitation to what shapes you can use 3d print?

what is the advantage of 3d printer in medical and automotive industry?

what is the impact of using 3d printing in automotive industry?

Can you give some example 3d printer that always people use in industry ?

what is the best application use for 3d printer in industry?

How it 3d printing use in medical field?