Stems shall be of dezincification-resistant silicon bronze ASTM B 371 or low-zinc alloy B 99, non-asbestos packing and malleable or ductile iron handwheel.
阀杆材质是符合美国材料试验协会ASTM B 371标准抗失锌现象的硅青铜，或B 99低锌合金，不含石棉的填料，和可锻或球墨铸铁手轮。
2
The casting materials can meet the technical requirements of common gray iron top-grade cast iron, ductile cast iron and non-ferrous alloy, etc.
铸件材质能满足普通灰铁、高级铸铁、球墨铸铁、有色合金技术要求。
3
CVD is capable of producing thick, dense, ductile, and good adhesive coatings on metals and non-metals such as glass and plastic.