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1.The engineer designed a new model of the globe grinding head.
工程师设计了一种新型的球磨机头部。
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2.The company has invested in research and development for the globe grinding head.
该公司投资于研究和开发球磨机头部。
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3.The engineer explained how to use the globe grinding head effectively.
工程师解释了如何有效地使用球磨机头部。