Complex sentence: Originally built by Clyde Engineering in the 1960s as Queensland Rail 1460 and 1502 class locomotives, they were purchased by Tranz Rail in 1995 to be rebuilt, as a cheaper alternative to buying new locomotives.
Split into simpler sentences: Originally built by Clyde Engineering in the 1960s as Queensland Rails 1460 and 1502 class locomotives. They were purchased by Tranz Rail in 1995 to be rebuilt, as a cheaper alternative to buying new locomotives.