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1.The combination drilling machine is used to drill holes in concrete.
组合钻机用于在混凝土中钻孔。
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2.The engineers developed a new combination drilling machine to improve efficiency.
工程师们开发了一种新的组合钻机，以提高效率。
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3.The combination drilling machine can handle large-scale projects more efficiently.
组合钻机能够更高效地处理大规模项目。