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A DRILLING TOOL,A SELF-DRILLING ROCK BOLT,A DRILL BIT,AN ANCORING DEVICE FOR A SELF-DRILLING ROCK BOLT,A SHAFT FOR A DRILLING TOOL AND AN END COUPLING FOR A DRILLING TOOL
A DRILLING TOOL,A SELF-DRILLING ROCK BOLT,A DRILL BIT,AN ANCORING DEVICE FOR A SELF-DRILLING ROCK BOLT,A SHAFT FOR A DRILLING TOOL AND AN END COUPLING FOR A DRILLING TOOL