detecting piece造句

The assertions are based in part on five hours of underwater video now being examined by an investigative commission headed by the deputy prime minister, Ilya Klebanov . Russians officials have cited external damage on the submarine's hull that they said could have only been caused by scraping another large object, and they have reported detecting pieces from unknown foreign submarines lying on the ocean floor.
It's difficult to find detecting piece in a sentence. 用detecting piece造句挺难的