Workshop Technology
A basic shaft is one whose

Lower and upper deviations are zero
Upper deviation is zero
None of the listed here
Lower deviation is zero

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Workshop Technology
Shift is a casting defect which

Results in general enlargement of a casting
Results in a mismatching of the top and bottom parts of a casting
Occurs near the ingates as rough lumps on the surface of a casting
Occurs as sand patches on the upper surface of a casting

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