contact process
contact process is a method to prepare sulphuric acid / oil of vitriol in industrial cases.
en-GB/ˈkɒntækt ˈpɹəʊsɛs/
en-US/ˈkɑnˌtækt ˈpɹɑˌsɛs/
contact process is a method to prepare sulphuric acid / oil of vitriol in industrial cases.