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 a high grade material that presents {HEAD ~ good resistance} to {TAIL ~ 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 a high grade material that presents { HEAD ~ good resistance } to { TAIL ~ 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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL