2. "The valve body material shall be shock resistant
ductile iron with extended neck for 2"of insulation.
阀体材料是抗冲击的球墨铸铁,可在密封状态下将阀颈延长2英寸。
3. I was founded in 1994, is a specialized in cast iron, cast steel, alloy cast iron,
ductile iron casting processing units.
我公司成立于1994年,是一家专门从事铸铁、铸钢、合金铸铁、球墨铸铁的铸造加工单位。