Slide 1…Sharing knowledge PRESENTS CONCRETE PUMPING SOLUTION FOR HIGH RISE AND LONG DISTANCE PUMPING WITH 1407 D HR CONCRETE PUMP……………. Slide 2 …Sharing knowledge…
Slide 1 Be kind or be left behind Slide 2 http://www.cdnresearch.net/pubs/others/trivers_1971_recip.pdf 1.Helping in times of danger 2.Sharing food 3.Helping the ill, the…