double sheathed needle

例句：

1. 1.The surgeon used a double sheathed needle to make the incision.
   外科医生用双层套针做了这个切口。
2. 2.The farmers used double sheathed needles to plant their crops.
   农民们用双层套针来种植他们的庄稼。
3. 3.The engineer designed a double sheathed needle for the construction project.
   工程师为这个项目设计了一个双层套针。