Complex sentence: Other inventors increased the efficiency of the individual steps of spinning (carding, twisting and spinning, and rolling) so that the supply of yarn increased greatly, which fed a weaving industry that was advancing with improvements to shuttles and the loom or'frame'.
Split into simpler sentences: Other inventors increased the efficiency of the individual steps of spinning (carding, twisting and spinning, and rolling) so that the supply of yarn increased greatly. This in turn fed a weaving industry that advanced with improvements to shuttles and the loom or'frame'.