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				| 1. | The_nuts_which_are_widely_used_in_automobile_and_locomotive_engines_and_also_in_steam_engine_are___________nuts.$ | 
| A. | Simmond’s locknut | 
| B. | Penn nut | 
| C. | Castle nut | 
| D. | Sawn nut or wiles nut | 
| Answer» D. Sawn nut or wiles nut | |