deadweight ton造句怎么写

By the end of 1997, China's merchant ships had increased to 320,000 with a total deadweight tonnage of close to 50 million, of which more than 23 million were of the fleets in foreign trade transportation.

That's deadweight tonnage in both cases.

deadweight tonnage of cargo=net deadweight

deadweight tonnage - DWT: The weight in long tons that a vessel can carry when fully laden.