Valve materials: stainless steel 304, 316, (304l, 316l), steel, cast iron, forged steel, etc.
阀门材质有：不锈钢(304、316、304l、316l)、铸钢、铸铁、锻钢等。
In these extreme engine environments, traditional valve materials can't stand up to the punishment.
在这些极端恶劣的发动机环境中，传统气门材料无法承受这种“酷刑”。
These are bolting materials suitable for high temperature service with austenitic stainless steel valve materials.
这些是适用于高温应用环境的奥氏体不锈钢阀门的螺栓材料。
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