Complex sentence: In 1961, Steinway for New York built grand pianos introduced its "Permafree" action which used teflon parts in place of cloth bushings and were intended to withstand wear and humidity changes better than cloth.
Split into simpler sentences: In 1961, Steinway introduced its "Permafree" action for New York-built grand pianos, using teflon parts in place of cloth bushings. The teflon was intended to withstand wear and humidity changes better than cloth.