encryption unit造句

According to the Customs affidavit, Hsu contacted Mykotronx in May to ask about the cost of the encryption units.
The agent told Hsu that the encryption units would require an export license and China was prohibited from buying them under the Arms Control Export Act.
The men, Eugene You Tsai Hsu, of Blue Springs, Mo ., and David Tzu Wvi Yang, of Temple City, Calif ., were charged with trying to buy encryption units from a Maryland manufacturer and ship them through intermediaries to China, customs officials said.
It's difficult to find encryption unit in a sentence. 用encryption unit造句挺难的