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SSAP( Special Structure of Asphalt &
Polyurethane) & āIā-Joint Roofing System
Open
a New Era in Roof Waterproofing
System
(US
Patent No. 6460304 : I-Joint
Roofing System)
(USA
Patent Pending : Special
Structure Asphalt Sheet)
(Korea
Patent No. 0258535
: Forced Exhaust Device)
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