The ability to retrofit a large number of SCR systems over a short period of time was exemplified in Germany during the late 1980s.
Germany was the only country retrofitting SCR systems in the 1980s.
mnli hypothesis: Germany was the only country retrofitting SCR systems in the 1980s. premise: The ability to retrofit a large number of SCR systems over a short period of time was exemplified in Germany during the late 1980s.