class d operations造句

例句与造句

1. Under CARs, HFRS falls under Class D operations, which is that it involves a jettisonable human external load suspended beneath the landing gear of the helicopter.
2. The station broadcasts at 500 watts during the day and 29 watts at night as a Class D operation, to protect nearby Class-A clear-channel station CBEF Windsor, Ontario.
3. It's difficult to find class d operations in a sentence. 用class d operations造句挺难的