单选题Which of the listed devices could be used as a substitute for a ring grooving tool?（）ASteel brushBFine emery cloth or steel woolCA section of the removed compression ringDA case hardened scraper
单选题
Which of the listed devices could be used as a substitute for a ring grooving tool?（）
A
Steel brush
B
Fine emery cloth or steel wool
C
A section of the removed compression ring
D
A case hardened scraper
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解析：
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