... W ,UL, WL, Rod . Material grade :M1700,M1800,M1900.2) Standard dimension (mm):3/6,4/9,6/ ... 2)Chemical propertyOxygen-resistance under high temperature: in oxidizing atmosphere,on the surface of element owing ... extension, so that loses its protective ability,In the oxidizing atmosphere,when the element is continuously ... assure that the element it veryically hung.in order to prevent the element from being ...