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1.The spark-erosion perforation in the circuit board is causing a problem.
电路板上的火花蚀孔造成了一个问题。
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2. The engineer used a special tool to remove the spark-erosion perforation from themetal surface.
工程师使用一种特殊的工具从金属表面去除火花蚀孔。
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3. The process of spark-erosion perforation is crucial for the operation of the machine.
火花蚀孔的过程对于机器的运行至关重要。