1) (to cause a country etc) to develop industries as an important or main part of the economy (industrialize)
2) forming the main part; a main part or product for trading; a U-shaped metal pin hammered into a surface, used to hold something in position; a piece of wire as pushed through sheets of paper and bent to hold them together (staple)
the body of a plane (to which the engine(s), wings and tail are fitted)
bulk; central portion