Industry welding plate Sdandard :JB/T7974-99 Material:HT200-250,Ductile. Industry welding plateusage:apply to all kinds of test work,and the reference plane used to measure of precisionT-slot cast iron platformmaterial :high-strength cast iron HT200--300,the product has steadiness in precision, good wearproof ability, good materialBe good at producting the heavy castings about 100tons.1) ...