Original sentence: By the mid-1980s, however, despite attempted remedial measures, Czechoslovak industry was lagging the West: it was energy intensive, innovation and investment in new plant were insufficient, and labor productivity was low.During the 1970s, Czechoslovakia had signed specialization and joint investment agreements with other Comecon members, committing the country to specific long-term obligations, in particular production branches (machine tools and railroad locomotives, for example), partly to ensure the inflow of energy and raw materials.In 1985 the most important branches of industry in terms of the monetary value of their contribution to the economy were machinery, electrical engineering, metalworking, chemicals, asbestos, rubber, and ferrous metallurgy (including ore extraction).The Czechoslovak Socialist Republic (1948–1989) greatly developed an already substantial industrial base, and became an important supplier of industrial products to other Comecon nations
Edited sentence: During the 1970s, Czechoslovakia had signed specialization and joint investment agreements with other Comecon members, committing the country to specific long-term obligations in particular production branches (machine tools and railroad locomotives, for example), partly to ensure the inflow of energy and raw materials.In  1985 the most important branches of industry in terms of the monetary value of their contribution to the economy were machinery, electrical engineering, metalworking, chemicals, asbestos, rubber, and ferrous metallurgy (including ore extraction)