Workshop Technology
The teeth of hacksaw blade are bent

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

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Workshop Technology
In permanent mould casting method

Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is forced into mould under high pressure
Molten metal is poured and allowed to solidify while the mould is revolving
None of these

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