Workshop Technology
The teeth of hacksaw blade are bent

Alternately towards right and left and every third or fourth left straight
Towards right
May be bent in any direction
Towards left

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Workshop Technology
Sand wash is a casting defect which

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
Results in general enlargement of the casting

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