The coal industry, therefore, was transformed into a chemical one, which, in turn, became a power industry erected upon the bony structure of steel and based on electrical energy.
(The coal industry; was transformed; into a chemical one) (a chemical one; became; a power industry erected upon the bony structure of steel) (a power industry; erected; ) (a chemical one; based; on electrical energy)
The coal industry a chemical one a power industry a chemical one
was transformed became erected based
into a chemical one
a power industry erected upon the bony structure of steel
on electrical energy