概要：
Massivemachinesrequireengineeringextremes. Themassiveman-madesatellite,commonlyknownastheInternationalSpaceStation,hurtlingaroundtheEarthat27,600kmanhour,hasbeenatemporaryhomeforhumansforthelast20years.Thebiggestlandvehicleonearth,abucketexcavatortitledBagger293,thatcanmove240,000cubicmetersofdirteachday.Innovationhasa...
