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Double-layer square steel pass sound insulation structure patent

Tag: 專利

Patent for basement and its moisture-proof ventilation system

Patent for basement and its moisture-proof ventilation system

The installation structure patent of base skeleton damping and sound insulation

The installation structure patent of base skeleton damping and sound insulation

Patent for wall structure of compound building to prevent sound wave of solid noise

Patent for wall structure of compound building to prevent sound wave of solid noise