Complex sentence: The historical machines were preserved in their places (except for several pieces brought from other buildings), so a guided tour to the mill follows the technological process from timber cutting and pulp production to board drying, sorting, and packing.
Split into simpler sentences: The historical machines were preserved in their places (except for several pieces brought from other buildings). A guided tour to the mill follows the technological process from timber cutting and pulp production to board drying, sorting, and packing.