3 Additional belay anchors may be installed/replaced where no natural means of protection is available and where the existing belay anchor is inadequate.
3 Additional belay anchors may be installed/replaced where no natural means of protection is available and where the existing belay anchor is inadequate.
3当某处无法用天然的确保方式，且该处既有的确保固定点不适用时，可另外增设或替换固定点。