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特殊凿井法
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特殊凿井法
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工学
特殊凿井法
释
special shaft-sinking method
特殊凿井法
在不稳定的含水地层或在含水量大的稳定地层中,为加固井筒围岩或隔绝水流等而采用的凿井方法。
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Dome of Florence Cathedral
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dome-shaped kiln
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