officedweller said:
They are pipes for concrete pumps.
Eventually they may install a more permanent pump and boom system like on tower construction.
Click to expand...
Aha! I thought those were cranes. Or some kind of huge robot arm that does the job of a crane. If they are pumping water, I guess the worst that could happen is, someone could get wet if there's a leak. (But if they are pumping sewage, stay away!)
 
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