. . . . . . "The C.I.O. is also far more strategically situated in industry than is the A. F. of L. The main strength of its fifteen affiliated unions lies in the basic and mass production industries???coal mining 500,000; auto 300,000; steel 300,000; textile 90,000; oil 80,000, and some 300,000 in the rubber, electric, aluminum, metal mining, shipbuilding and other industries." .