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