The new model has a fixed structure holding its big, gassy balloon in place. That’s unlike a blimp, which goes flat when the helium is removed.
JSOnline.com Business, Milwaukee Journal Sentinel: Business
Fri, 08/28/2015 - 6:38pm
The new model has a fixed structure holding its big, gassy balloon in place. That’s unlike a blimp, which goes flat when the helium is removed.