Zhejiang Chupin stationery Co., Ltd: We're known as one of the most professional plastic notebook, stitched notebook, coil book, binding notebook, loose-leaf coil book manufacturers in China. Please
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Changzhou FHD Electronics Co., Ltd: Changzhou FHD Electronics is specializing in piezo buzzer, magnetic buzzer, mylar speaker and sensors since 2010. ISO9001 and IATF16949 certificates, 25 patents including 2 invention patents.