锌合金材质，整体镀锌，环境适应性优良。
Zinc alloy material, galvanization, good environmental adaptability.
材质使用高强度锌合金压铸而成，结构美观大方，防盗性强。
High-strength zinc alloy die casting material for beautiful and elegant lock and high security performance.
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。
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.
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