double-conical saw

例句：

1. 1.This double-conical saw is very useful for cutting curves in wood.
   这款双锥锯在切割木材曲线时非常有效。
2. 2.The engineer used a double-conical saw to cut through the thick log.
   工程师使用双锥锯切开了这根厚厚的木头。
3. 3. The construction crew used a double-conical saw to clear away the debris from the site.
   建筑工人使用双锥锯清理了现场的残骸。