A programmable, closed-loop control system that provides for control under normal and seismic conditions. The present system integrates monitoring and control functions and provides for reconfigurable control of these functions. The seismic monitoring and control system optimally controls valve-type...http://www.google.com.hk/patents/US5412616?utm_source=gb-gplus-share專利 US5412616 - Safety monitoring and control system
