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
Riddle is used for

Cleaning the moulding sand
Reinforcement of sand in the top part of moulding box
Moistening the sand around the edge before removing pattern
Smoothing and cleaning out depressions in the mould

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