non-rising spindle gate valve是什么阀门啊!如题,再追加分数···还有 lever operated butterfly valve
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英语翻译小女子求阀门翻译- Epoxy coated flanged RSV gate valves non rising spindle 是什么阀门啊?
non-rising spindle gate valve是什么阀门啊!如题,再追加分数···还有 lever operated butterfly valve
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