9 Self-tapping/self-drilling bolts should not be used unless they are specifically recommended for rock climbing and meet the minimum European standard when installed according to instruction.
9 Self-tapping/self-drilling bolts should not be used unless they are specifically recommended for rock climbing and meet the minimum European standard when installed according to instruction.
9施工时，铁板牙锚栓/钻尾锚栓并不适用，除非其上有注明专为攀岩活动设计，并符合欧洲标准的最低标。