Complex sentence: The excavation of the site in 1992 revealed the hot shot oven which was uncovered and the metal parts for rolling the shot were preserved and the oven and archaeological trenches were filled in at the request of the RSL.
Split into simpler sentences: The excavation of the site in 1992 revealed the hot shot oven which was uncovered and metal parts for rolling the shot which had been preserved. The oven and archaeological trenches were laterx filled in at the request of the RSL.