electric spark machining的用法和样例：
例句
- Electric discharge machining, creping, and blasting are possible after welding, as well as heat-treating and nitriding.
焊补后的模具可进行放电加工，热处理及渗氮处理等。 - Although those materials can be machined using the ECDM method, its machining mechanism is still indeterminate.
虽然电化学放电加工法可加工上述材料，但其加工机制尚有很多不明确之处。
