packthread

例句：

1. 1. The antique books were carefully packed and shipped overseas.
   这些古书被仔细地打包并运往海外。
2. 2. The packaging line is responsible for assembling the product in a neat and organized manner.
   包装线负责将产品组装得整齐有序。
3. 3. The worker used a special packing thread to secure the package before it was sent out.
   工人使用一种特殊的包装线来固定包裹，然后将其发送出去。