Largeerrors can be generated if the hole has burrs, rounded edges or other imperfections, but even when the hole is near-perfect a residual error remains.
The fallen burrs entangled a number of hoppers, and many were impaled by burrs still attached to the grass ; the impalement of hoppers usually occurred during the periods of ecdysis.
If the specified burr height is low, an additional shaving operation is required to shave away the excessive burr height produced by the piercing operation.
The direction of the piercing operation will be same as the burr-side the burr-side is the additional design specification input by the user during the feature-modelling phase!.
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