Customer buy PLC splitter production line and doing skill training in our workshop

The customer Have buy a PLC splitter production line and come to our work shop to learning How to produce splitter . The Technical engineer are teach carefully step by step.  After two days training , the customer and manage focus the 1×2 plc splitter , 1×4 ,1×8  1×16  ….. very well .  What is a good teacher and smart student.