主营产品：Installation and maintenance of electric doors and windows, fireproof doors and windows, industrial doors, rolling shutter doors, garage doors, telescopic doors, wrought iron processing fences, guardrails and railings, stainless steel door and window processing
主营产品：Fire-fighting equipment and supporting products, portable trolley-type fire extinguisher maintenance, drug replacement, pressurization, annual inspection, trolley-type dry powder fire extinguisher pressurized annual inspection, carbon dioxide fire extinguisher maintenance, drug replacement and powder filling, water system foam fire extinguisher maintenance annual inspection
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Tianjin fire-proof r
