后经本厂技术人员多年攻关和市场经验的积累，逐步过渡为自主研发、自主设计，并形成了系列化、多样化的产品结构。
After years of research and experience accumulation by our technician, gradually we can develop and design by ourselves and formed series, diversified product construction.
后经本厂技术人员多年攻关和市场经验的积累，逐步过渡为自主研发、自主设计，并形成了系列化、多样化的产品结构。
After years of research and experience accumulation by our technician, gradually we can develop and design by ourselves and formed series, diversified product construction.
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