Chinese national Sihai Cheng was sentenced to nine years in U.S. federal prison for his role in conspiring to export American-made pressure transducers to Iran in violation of U.S. export laws.  Charges against his Iranian co-conspirator, Seyed Abolfazi Shahab Jamili, were dropped as part of the prisoner exchange agreement with Iran on January 17.  Cheng sold Jamili thousands of controlled goods with nuclear applications, including vacuum pressure valves, titanium sheets and tubes, and electronic switches.