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Process metal coils such aluminum and iron, metal ceiling tile perforation lines create perforated ceiling panels with different apertures and specs. Common sizes include 300x300mm, 600x600mm, and 1200x600mm; common apertures are 1.8mm and 2.5mm. Especially in public areas like school classrooms, offices, shopping centers, cinemas, and computer rooms—where demand for them is rather high—these perforated ceiling panels are crucial in current architecture and interior design.