Safety analysis on the kelly bar subassembly of a 250kN.m-type rotary drilling rig for foundation of geological construction (기초지질 공사용 250kN.m급 RDR의 켈리바 거즈 안정성 분석)
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- Proceedings of the Korean Society of Precision Engineering Conference
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- 2012.10a
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- pp.709-710
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- 2012