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受西德诺尔德莱茵—威斯特伐伦政府资助的一个科研项目由矿山研究有限公司与威尔茨公司的一家机器制造厂A协作,用高压水射流改进硬岩石的钻进,已经开始了全断面的试验工作。
A research project financed by the government of Rhine-Westphalia in West Germany led by Mine Research Ltd in collaboration with a machine manufacturer in Wirtz, A, to improve hard rock drilling with high-pressure water jets Full cross-section of the test work.