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Phenolic Diaphragm buyer & importer

 
     
 
[TT] [F821568] 特里尼达和多巴哥求购酚醛树脂隔膜(Phenolic Diaphragm) (11-30)
  Sir, What will be the cost of one piece of this diaphragm. Do you make the impedence as required example 4ohms or 3.6ohms. Can you make 77mm voice coil diaphragms if requested.

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