Agencies often post notices to FedBizOpps about upcoming Industry Days, but it can be expensive and time-consuming to attend. In many cases the presentations are posted after the event to FBO, or you can contact the Contracting Officer listed and ask if the presentation will be available.
In this example, an Industry Day was held at the Pearl Harbor Naval Shipyard on Dec 19th. After the event the agency posted a PowerPoint presentation, along with a series of Q&A from attendees.