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Hangzhou Yuhang Zhengda Machinery Co.,Ltd.is a professional exporting manufacturers of brake parts of heavy-duty trucks and trailers.With more than 10 years in this field,we have rich experience in making and designing and servicing for you. Our main products: manual slack adjuster,automatic slack adjuster,S-camshaft,brake shoe,non-asbestos brake lining,brake chamber. Using the latest technology and equipped with advanced machinery,we provide various kinds of products for our customers who from North American,South American,Australia,Southeast Asia and Europe and so on. Adhering to our zero defect policy,we implement ISO9001-2000-certified systems.We also perform product parts approval process(PPAP) and failure mode and effect analyses(FMEA),covering handling damage,cracking,improper set-up,grounding,open circuit,short circuit and wearing. We believe we will be your right eye in China.