water supply and drainage engineering solutions

Nyob rau hauv kev tsim kho dej thiab tso dej system, HVAC thiab kev thauj mus los ntawm cov kua dej, PPR (random copolymer polypropylene) yeeb nkab thiab haum tau dhau los ua qhov kev xaiv tseem ceeb rau nws cov kev tiv thaiv corrosion, anti-scaling, lub neej ntev thiab lwm yam ntxwv. Txawm li cas los, ib…