ðeɪ dɪvˈɛləpt ɐ mˈɛθəd ʌv pɹədˈuːsɪŋ tˈiːɹˈeɪlz fɔːɹ kənstɹˈʌktɪŋ ɹˈeɪlɹoʊd tɹˈæk, wˌɪtʃ pɹˈiːviəsli hɐdbɪn ɪmpˈoːɹɾᵻd fɹʌm ˈɪŋɡlənd.
They developed a method of producing T-rails for constructing railroad track, which previously had been imported from England.