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| Yee Fong Chemical & Industrial Co., Ltd. / Corporation |
| 7F, No.310, Chukwang Rd., Taipei, Taiwan |
| TEL：02-23062131 |
| FAX：02-23048133 |
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| Yee Fong Chemical & Industrial Co., Ltd. / Taoyuan plant |
| No.377, Haihu E. Rd., Lujhu Township, Taoyuan County, Taiwan |
| TEL：03-3541944 |
| FAX：03-3541957 |
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