waterproof zipper|airtight zipper|airproof fastener
Cover: navigation engine, electropult, weapon ammo, exploder, and chemical, missile, airplane, important instrument and container.
Protection: space suit, diving suit, immersion suit, life jacket, fishery suit, protective clothing, decompression clothing, radiation protective
Others: air lock room, water walking ball, tent, life raft, survival instrument, shipping instrument, hovercraft, water bed and so on.
Instruction watertight zipper, airproof fastener, airtight zippers ， airproof zippers storage