该术语通常是指钢的小碎片，如手工具、小零件、钻头喷嘴等，也可能是指钻头碎片或其它井下工具的碎片，以及磨铣作业所产生的残留物等。
The term is usually reserved for small pieces of steel such as hand tools, small parts, bit nozzles, pieces of bits or other downhole tools, and remnants of milling operations.
在某些情况下，将落鱼的外部彻底磨铣，使落鱼体和剩余的碎片能被推至井筒底部。
In some cases, the outer portion of a fish may be milled out to allow the body and remaining debris to be pushed to the bottom of the wellbore.
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