| http://www.w3.org/ns/prov#value | - The receptacle has walls of sheet material each including at least one layer forming a barrier essentially impermeable to such gas, and a seal sealing...http://www.google.co.uk/patents/US6974447?utm_source=gb-gplus-sharePatent US6974447 - a receptacle for a therapeutic fluid susceptible to deterioration on exposure to a gas such as oxygen or carbon dioxide; has walls of sheet material each includi
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