Answer:
Core print
Explanation:
According to my research on different mold creation methods, I can say that based on the information provided within the question this is known as something called a Core print. This is (like described in the question) an open space provided in the mold for locating, positioning and supporting the core.
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Its TRUE. You could end up hurting yourself if you exercise those muscles too much. Such as spraining them.
The Steering Nozzle can cause severe internal injuries
