Plasma is generated within the space to cause dissociation of the hydrogen containing gas and promote {HEAD ~ a reaction} between the material and {TAIL ~ hydrogen} containing gas 
between
Plasma is generated within the space to cause dissociation of the hydrogen containing gas and promote { HEAD ~ a reaction } between the material and { TAIL ~ hydrogen } containing gas
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH