Echo CS-310 Operator's Manual page 27

CS-310 OPERATION
Do not use replacement saw chain unless it has been designated as meeting ANSI B175.1 or CSA
Z62.1, .3 kickback performance requirements, when tested on the representative sample of chain
saws below 3.8 c.i.d. specified in ANSI B175.1 or CSA 62.1, .3.
Note: LOW KICKBACK SAW CHAIN meets the kickback performance requirements of ANSI B175.1 or CSA
62.1, .3 (safety requirements for gasoline-powered chain saws).
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