Automobile Engineering in ME
The two kinds of piston rings are

Compression and sliding seal rings
Pressure and sealing rings
Compression and oil control rings
Oil scrapper and oil control rings

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Automobile Engineering in ME
In bias ply tyres

All plies run parallel to one another
Belts of steel mesh are used in the tyres
One ply layer runs diagonally one way and another layer runs diagonally the other way
All of these

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