Building Surveyor of the Buildings Department (BD), Ms WONG Shu-wan, says that traps connected to sanitary fitments in a residential flat play a vital role in the drainage system.
Building Surveyor of the Buildings Department (BD), Ms WONG Shu-wan, says that traps connected to sanitary fitments in a residential flat play a vital role in the drainage system.
Building Surveyor of the Buildings Department (BD), Ms WONG Shu-wan, says that traps connected to sanitary fitments in a residential flat play a vital role in the drainage system.
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