The hydrogen permeable material exhibits excellent hydrogen permeability as well as {TAIL ~ excellent resistance} to embrittlement caused by the permeation of {HEAD ~ hydrogen} 
The hydrogen permeable material exhibits excellent hydrogen permeability as well as { TAIL ~ excellent resistance } to embrittlement caused by the permeation of { HEAD ~ hydrogen }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD