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日本运输省最近在三菱重工等六个机械产业厂家配合下,研制成功用高压喷流开挖水下岩石的新技术。这一技术不但能开挖所有水下岩石,也可开挖硬度极高的花岗岩石。 运输省与各厂家计划在1980年完成定型设计和样机试制。预定 5年后造出喷射压力为1000公斤/厘米~2,喷流量达5000升/分的实用机。
Japan’s Ministry of Transport recently developed a new technology to successfully excavate underwater rock with a high-pressure jet under the cooperation of six heavy machinery manufacturers such as Mitsubishi Heavy Industries. This technique not only excavated all underwater rocks, but also excavated granite with very high hardness. Transport Province and the manufacturers plan to complete stereotypes design and prototype trial in 1980. Scheduled 5 years after the injection pressure to create 1000 kg / cm ~ 2, jet flow of 5000 liters / min utility machine.