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US06993792B2 Draft barrier system 失效
起草障碍系统

Draft barrier system
Abstract:
A draft barrier system having a sliding fastener that lets a user selectively alternate a volume of material between open and closed formations. When the sliding fastener closes the volume of material into the closed formation, insulation is compressed together to form a seal that helps prevent air from moving between the interior and the environment through the sliding fastener.
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