Shenzhen Yehai Sci. & Tech. Deve. Co., Ltd. is one of Chinese main test instrument manufacturers within 10 years Specializing in professional test and measurement instruments with 10 years,we boast a high-tech factory housing advanced production and calibration equipment. Moreover, our comprehensive quality assurance system and experienced R&D team make us one of top factories in this field in Asia. Shenzhen Yehai Technology Development Co., Ltd. is one of the memebers of 500 Well selected ...