rock surface meaning in English

浮露岩面

Soundness of the rock surface must be included in the topographic study .
岩石表面的坚固性，必须包括在地形研究之内。
If the gouge layer is thin, contact between asperities on the rock surfaces can occur .
如果充填物层很薄，两个岩石表面上的凸起物就有可能互相接触。
Old bolts must not be left protruding from the rock surface
留在岩壁上的老旧固定支点决不能凸出岩面。
Feature flat coloured patches on rock surfaces and tree trunks
形状扁平，颜色灰沉，丛生于大石及树干。
Surface plates ; natural hard rock surface plates ; requirements and testing
平板.天然硬石平板.要求检验

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