However, in the concrete embodiment selected here, {HEAD ~ the module} width MB is variable, which is ensured with BX according to {TAIL ~ variable intermediate pieces} 
However , in the concrete embodiment selected here , { HEAD ~ the module } width MB is variable , which is ensured with BX according to { TAIL ~ variable intermediate pieces }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL