MCQOPTIONS
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| 1. |
The gaskets can be made by __________$ |
| A. | Gutta-percha |
| B. | Nitrile rubber |
| C. | Thiokol rubber |
| D. | BUNA – S |
| Answer» D. BUNA ‚Äö√Ñ√∂‚àö√ë‚àö¬® S | |