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				| 1. | WHAT_IS_THE_VALUE_OF_SURFACE_ROUGHNESS,_WHICH_IS_GENERALLY_OBTAINED_USING_CHEMICAL_MILLING??$ | 
| A. | 0.01 – 0.08 µm | 
| B. | 0.1 – 0.8 µm | 
| C. | 1 – 8 µm | 
| D. | 10 – 80 µm | 
| Answer» C. 1 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 8 ¬¨¬®¬¨¬µm | |