model_code,size,stroke,rod,sensor,step_file
ULX50040AK0,50,40,A,K,ULX50040AK0.step
ULX50040AN0,50,40,A,N,ULX50040AN0.step
ULX50040GK0,50,40,G,K,ULX50040GK0.step
ULX50040GN0,50,40,G,N,ULX50040GN0.step