The second consists in putting a protective plate into place on the surface of the sheet that faces towards the pump chamber, which protective plate is made of {HEAD ~ a high grade material} that presents {TAIL ~ good resistance} to corrosion 
The second consists in putting a protective plate into place on the surface of the sheet that faces towards the pump chamber , which protective plate is made of { HEAD ~ a high grade material } that presents { TAIL ~ good resistance } to corrosion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH