若攀登路线角度小于直角，应使用无挂环机械锚栓，以减低对景观的影响。

For climbs less than vertical hangerless machine bolts are recommended to reduce visual impact.

youdao

若攀登路线角度小于直角，应使用无挂环机械锚栓，以减低对景观的影响。

For climbs less than vertical hangerless machine bolts are recommended to reduce visual impact.

youdao