Anti-collapse problems and anti-collapse strength calculations of geological bubings are systematicallydiscussed,with number of tables listed for field reference.
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张平占.地质管材抗外挤问题的探讨[J].钻探工程,1994,(6):21-23.Zhang Pingzhan. Anti-Collapse ProblemS on GeologicaI Tubings[J]. Drilling Engineering, 1994,(6):21-23.