Siruba held a 2009 Technical Seminar for all the technicians of our agents in Dhaka , Bangladesh . Siruba technician Mr. C.T. Chang instructed them in the knowledge and maintaining skills of BH790 (Electronic High-speed Lockstitch Button Holing Machine ) and S007 (High-speed small cylinder bed interlock stitch machine). All participants felt great and confident of Siruba new model machines.