| 释义 |
1 ?高频冲击钻进 ... high-frequency microvoltmeter 高频微伏表 high-frequency drilling 高频冲击钻进 high-frequency approximation 高频近似 ... 2 [矿业]?高频凿岩 ... 高频选矿机 high-frequency separator 高频凿岩 high-frequency drilling 高频凿岩机 high-frequency rock drill ...
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Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area. 由于几何光学法求解钻头震源波动方程的高频近似解有局限性，即在焦散区失效，故只能计算非焦散区的高频近似解。 - 2
Low penetration as well as drilling incidents of high frequency resulted from problems caused by leakage, gas migration, collapsing sticking, well kick, blowout and so forth. 且常发生井漏、气侵、坍塌性卡钻、井涌与井喷等井下复杂问题，导致机械钻速低与钻井事故频发。 - 3
And we have CNC, CJK, Punch press, high-frequency heating machine, argon arc welding machine , drilling machine…. 拥有数控车床，冲床，仪表车，锯床，高频电热机。脉冲氩弧焊机，电焊机，钻床等设备。
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