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Sw Interlocking Kelly Bar 508-3 for Casagrande Drilling Rig B300 with Alloy Material Heat-Treated<Y. S 800+ MPa&T. S 980+ MPa>, Find Details and Price about Drilling Rig Bauer Kelly Bar from Sw Interlocking Kelly Bar 508-3 for Casagrande Drilling Rig B300 with Alloy Material Heat-Treated<Y. S 800+ MPa&T. S 980+ MPa> - Xuzhou Shenwei Foundation Machinery Technology Co., Ltd