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Tianjin Grewin Technology Co., Ltd.

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GREWIN as manufacture for Toroidal Transformer, current transformer, high frequency magnetics transformer, split core current sensor, clamp on CT, EI power Transformer etc. We have abtained ISO, CE, VDE, ISO2000 approval. Our company have many advantages which can be your honesty and reliable supplier: WHY CHOOSE US? A. Business philosophy "Quality and Honesty First“ B. Over 40 years experience of transformer designing and producing. C. Transformer 100% test before the shipment; D. UL, CE, ISO9001: 2008
E. We offer custom-made transformers, OEM and ODM... [Details]

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