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The pullout resistance of anchor rod in tunnel system is 1000. Is it 1 group?
No, according to the Technical Specification for Anchor Rod Construction in Tunnel System, the common equipment for the 1 anchor rod pull-out test stipulated in the tunnel anchor rod pull-out test is the hydraulic gauge of the hollow jack manual hydraulic pump, and every 300 pieces are sampled, and each group shall not be less than 3 pieces, so it is not 1000 pieces, so it is 1 group.
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