lap (seam) welder

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Fabric structure — Fabric structures are architecturally innovative forms of constructed fibers that provide end users a variety of aesthetic free form building designs. Custom made fabric structures are engineered and fabricated to meet worldwide structural, flame … Wikipedia
Welding — is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld puddle ) that cools to… … Wikipedia

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