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日本制造了一种超高频装置——磁控器,用于破碎硬岩石。磁掘机发出的信号被岩石中的水分吸收时,能引起高频振荡,使岩石中的温度提高到
Japan made a super-high frequency device - the magnetron, used to crush hard rock. Magnetic excavator signal is absorbed by the rocks in the water, can cause high-frequency oscillation, the rock temperature increased to