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Subject Item
isa:382551478
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prov:value
In the preferred practice of the invention the substrate is made of a material, e.g. metal, that is moisture and gas impervious to maintain the insulating gas in the compartment and prevent the ingress of moisture into the compartment, and has structural integrity to maintain the glass sheets 14 in spaced relation to one another.
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n4:com
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isa:382551478