Jiaxing Jingkong Electronic Co.,Ltd(JJK) is a professional manufacturer of Quartz monitor crystals and Quartz crystal microbalance(QCM),which is located in Jiaxing city of Zhejiang province ,China.(Half an hour from Shanghai by high-speed rail) JJK has achieved continuous breakthrough and been a quartz monitor crystal leader in Optic&Vacuum coating industry in China since the beginning of 2004.We control every distinct production step in the manufacturing,from the supply of the high Q-raw ...