公锥与正、反扣钻杆及其他工具配合使用，可实现不同的打捞工艺。
The taper tap can effect different fishing operations when equipped with RH thread or LH thread drill pipes and other tools.
人们知道了这个消息时，纷纷赶到江边，上了小船准备把屈原的尸体打捞回来，可怎么也打捞不回来了。
When people knew the news, they rushed to the river, the boat ready to salvage the body of the qu yuan on the back, but can't salvage back.
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