The base of a brass bracket has to be rough ground to remove the unevenness. The $4$ wheels available in the store. The appropriate wheel is

A 30 K 12 V

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C 90 M 4 B

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C 30 Q 12 V

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C 50 G 8 V

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Solution

The correct option is A $A 30 K 12 V$
$A 30 K 12 V$

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