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				| 1. | WHICH_OF_THE_FOLLOWING_CASTING_TECHNIQUES_IS_THE_BEST_TECHNIQUE_FOR_CASTING_TUBES_AND_HOLLOW_PIPES??$ | 
| A. | Die casting | 
| B. | Slush casting | 
| C. | Centrifugal casting | 
| D. | Investment casting | 
| Answer» D. Investment casting | |