The existence of structural surface in rock mass often makes notable influence on rock mass quality.

岩体中结构面的存在往往会对岩体质量造成显著影响。

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The formulas for obtaining strength and strain parameters of rock mass are described using modified index RMR of rock mass quality.

用修定的RMR岩体量化指数从给定公式中确定岩体强度和应变参数。

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The research result shows that the rock block index has remarkable significance in engineering and advantages in rock mass quality assessment.

对比结果表明：岩体块度指数在岩石质量评价中能更准确地反映其优越性，具有更为显著的工程意义。

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In the past we could rely on mass production, low quality but low cost.

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He said police would no longer be needed by Sunday to oversee traffic at intersections where lights are out and that the return of mass transit will significantly improve quality of life for the city's residents.

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