发布时间:2025-02-06 21:53:01
执行标准是:JB_T 4719-1992 管壳式换热器用缠绕垫片
F11-500-1.0
浮头垫片-金属缠绕垫304材质+石棉填充 DN500 压力1.0
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2025-02-06 21:53:01 2025-02-06 21:53:01用400瓦的车载逆变器带350瓦的小电饭锅烧水对汽车电瓶有没有损害效果会怎样
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