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| Acrysunday Co.,Ltd. | Shinetsu Semiconductor Co.,Ltd. | Naoetsu Electronics Co.,Ltd. |
| Azuwan Co.,Ltd. | S.E.H.Sah Alam SDN.BHD. | Naoetsu Precision Co.,Ltd. |
| Iwaki Semiconductor Co.,Ltd. | S.E.H.Malaysia SDN.BHD. | Nagano Electronics Industrial Co.,Ltd. |
| N.E.Chemcat Co.,Ltd. | S.E.H.EuropeLTD. | Nabebayashi Fuji science Co.,Ltd. |
| Omiya Chemical Co.,Ltd. | Sugahara Institute Co.,Ltd. | Hamamatsu Photonics Co.,Ltd. |
| Omrou Co.,Ltd. | Sumitomo Metal Mining Co.,Ltd. | Phenitec Semiconductor Co.,Ltd. |
| Casio Micronics Co.,Ltd. | Daito Electron Co.,Ltd. | Fujikoshi Machinery Co.,Ltd. |
| Kanto Kagaku Co.,Ltd. | Dainichi Shoji Co.,Ltd. | PRECEED AMERICA,INC. |
| koshin Intex Co.,Ltd. | Takigen MFG.CO.,LTD | Micro Engineering INC. |
| Jandl Co.,Ltd. | Tateno Machine Tool Works Co.,Ltd. | Mitsumasa Semiconductor Co.,Ltd. |
| Showa Denko Co.,Ltd. | Toshiba Ceramics Co.,Ltd. | Yamato Scientific Co.,Ltd. |
| Shinetsu Engineering Co.,Ltd. | Tokiwa Stainless Co.,Ltd. | Watanabe Shoko Co.,Ltd. |
| Shinetsu Chemical Co.,Ltd. | Trimex Co.,Ltd. |
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