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Match the commonly used manufacturing process for the following products.
Match the commonly used manufacturing process for the following products.
| A. Thoriated nickel wire | 1. Single crystal growing |
| B. Aircraft turbine blade made form a nickel based super alloy | 2. Sand casting |
| C. Automobile crank shaft made for ductile iron | 3. Powder metallurgy |
| D. Silicon wafers used in the electronic in dustry | 4. Investment casting |
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