PDF(510 KB)
Application of Single-acting Double-tube Core-drilling Technique in Unconsolidated and Fracture Strata
HAO Yong-sheng
Journal of Railway Engineering Society ›› 2010, Vol. 27 ›› Issue (6) : 32-35.
PDF(510 KB)
PDF(510 KB)
Application of Single-acting Double-tube Core-drilling Technique in Unconsolidated and Fracture Strata
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