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- In an unbroken way; continuously.
- 1963 September, Cecil J. Allen, “Locomotive Running Past and Present”, in Modern Railways, page 187:
- After yet another check, there was once again a "Deltic" demonstration that no A4 would have been able to rival with a 340-ton load, speed being maintained unbrokenly at between 92 and 85 m.p.h. from Little Bytham up to Stoke Summit, where we were exactly 10min ahead of time.