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Air-tight door
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Door leaf parameters: 1.5mm galvanized steel sheet Door frame parameters: 10# angle steel Insulation performance: Grade 4 Air tightness performance: under the pressure difference △P specified below, the air leakage is lower than 10N · m3/hX level: pressure difference △P = 50mm ~ 150mm water column y level: pressure difference △P = 150mm ~ 300mm water column z level: pressure difference △P = 300mm ~ 500mm water column Executive standard: B .TS-205
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