CTC Technologies Co. Ltd. is the dealer of used test and measurement equipments in China. We are intested in buy/sell R&S CMU200, HP/Agilent E5515C, HP/Agilent 66311B etc. If you have some want to sell or some in need, please contact me by CTC-Tjbuyer22 at hotmail and my MSN is the same. Welcom to inquiry.