Oil pressure supply pumps for providing pressurized oil to a seal assembly for lubrication and cooling in motors and engines; cyclone separators; machine parts, namely, bearings with and without rollers and welded metal bellows, formed bellows and electron deposit bellows; metal couplings for machines; [ vacuum pumps for nuclear fusion; ] mechanical seals for industrial machines and industrial machine parts; [ rotary pumps; ] mechanical seals for home appliances; mechanical seals for pumps for household use for providing warm water; [ mechanical shaft couplings for land vehicles; ] valves being parts of machines, namely, land vehicle engines; mechanical seals for vehicles; metal bellows for use in the manufacture of land vehicles; and [ bearings for transmission shafts being parts of machines, namely, land vehicles engines; ] mechanical seals for vehicles' metal bellows for use in the manufacture of land vehicles; and [ bearings for transmission shafts being parts of machines, namely, land vehicles engines; ] mechanical seals for home appliances, and mechanical seals for pumps for household use for providing warm water; [ separators in the nature of fuel and oil filters for cleaning and purification of fuel and lubricating oil in marine engines; ] automotive control valves from compressors of air conditioning of vehicles; mechanical seal part consisting of seal-face materials made of ceramics; mechanical seal part consisting of cylinder joinings for use with mechanical seals