The ideal rock sample is the conical surface rock sample that can joint crest of teeth in single row drilling experiment.

在单齿圈破岩试验中，理想的岩样是与牙齿齿顶线相贴合的锥面岩样。

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The rack can be used to work on all kinds of micro-drilling experiments such as analyzing of rock sample drillability, testing of diamond tools aging and life span.

它可在室内从事各种微钻实验，包括岩样可钻性分析、金刚石钻具时效、寿命等实验。

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Drilling a few centimetres inside a rock provides a fresh sample that is free from the alteration that can occur at the surface as a result of weathering or radiation damage.

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