... hard alloy 2 EPDM sealing materials imported rubber modified 1.sliding door, stainless steel and color steel two kinds,2.the ... PU as core material, open and close easily, specially polyethylene sliding wheels, low temperature rubber seals, the main pieces of molded ... switch, maintenance is simple,4 .the installation of low-temperature doors imported heating wire, the -40 ° C without freezing,5. size ...