The invention pertains to {HEAD ~ a large format, plotter style automated laser engraver} which can be used to engrave {TAIL ~ various materials} 
used to engrave
The invention pertains to { HEAD ~ a large format , plotter style automated laser engraver } which can be used to engrave { TAIL ~ various materials }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL