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                 (栗村化学)                                                                                                

 

                                                                                                                     

  (东邦化成工业株式会社)                                                                                                                    

    

                                                                                                                        

   (昭和电工株式会社)                                                                                                                          ( コルコ—ト株式会社 )    

 

                                                                                                                         

(日本制纸)                                                                                                                                                        (东亚合成)                          

 

 

 

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