Our factory has put into a lot of manpower , material , energy and also rich professional knowledge such as shipbuilding and chemical industry to develop high-intensity winding-liner Ship launching and landing airbags. such double-balloon has the advantages of more scientific internal skeleton structure, no joint of the whole body, make the full use of break-resistant of material skeleton. It solved the problem of the uneven internal pressure of the wall when press the balloon. there is no phenomenon of delaminate and bubble and has no risk of sudden burst.