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Q. |
Aluminium is not a very good material for die casting because |
A. | it is very light but strong |
B. | its melting point is high, it erodes the die surface and tends to react chemically with die |
C. | it cools much slowly |
D. | none of the above |
Answer» B. its melting point is high, it erodes the die surface and tends to react chemically with die |
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