China Railway Second Bureau Kunming Emergency Rescue Team Performs Performance Upgrade of 620MM Large Diameter Horizontal Drill
ã€China Deep Hole Rig Trading Network】 On March 16th, the National Emergency Rescue China Kunming Second Bureau Kunming team invited Japanese experts to the Kunming base to perform performance upgrades on the FS-120CZ model 620MM large-diameter horizontal rescue drillin
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