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Solar water heater :material:1.volume of storage tank:120L,180L,240L,300L2.pressurized water tank:insulating layer,polyurethane foaming ,thickness:55mmouter shell of tank,fluorin titanium plate,thickness:0.4mminner tank,stainless steel SUS304-2B,thickness:1.2-1.5mm,normal working pressure:6bar,test pressure:12bar3.dust ring gasket :EPDM4.evacuated...
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