There are various cuts for piston rings, each having a particular application.
Blow are common cuts we usually do for different piston rings
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S
Straight Cut
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I
Right Cut
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L
Left Cut
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NE
Cut with Side Notch
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NH
Cut with Internal Notch
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SH
Hooked Cut
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SU
Step Cut
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G
Gastight cut
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RG
Round gastight cut
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SSH
Specail Step Cut
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OC
Oblique Cut