用于材质不够硬，而不能钻孔的时候，但材料表面的突出物必须最少。
Low profile captive fasteners are ideal solutions when parent material thickness is not sufficient to countersink, but protrusion above the face of the panel must be kept to a minimum.
我们应当尊重当地的登山规范与作风，绝不能钻孔眼，也不能安螺栓，不论当地是否有传统登山规则反对这一点。
We should respect local climbing ethics and style and never drill holes or place bolts where there is a traditional ethic against it or where no locally established ethics exists.
安全帽不能以任何方式进行修改，如钻孔并且进行定期检查以确定是否有明显的裂纹，缺陷和有效期。
Hard hats shall not be modified in any way, such as drilling and shall be regular inspected for visible cracks, defects and expiration date.
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