... 钻眼偏斜;散射：scattering 钻眼进度：penetration advance 钻眼班：drilling shift ...
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The application of the traditional test methods such as K30 test, static penetration test, on the condition is very difficult. So, we advance to test on the ballast directly by MSASW method.
然而，在铁路正常运营条件下，常规测试方法如K30试验、静力触探方法等很难实施。
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