This enables it to take up enough silicon from the walls of the crucible to prevent the evolution of gas during solidification, and the consequent formation of blowholes or internal gas bubbles. [Please select]
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This was quickly known by jets of blood being spouted up through the blowholes. [Please select]
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Baleen whales are externally distinguishable from toothed whales by having paired blowholes. [Please select]
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--A fin whale in the North Atlantic with the paired blowholes open during respiration. [Please select]
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The paired blowholes distinguish this animal as a baleen whale. [Please select]
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(bottom left) clearly showing the narrow upper jaw, the bonnet, and the widely separated blowholes. [Please select]
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Good cast iron breaks with a gray fracture, is free from blowholes or roughness, and is easily machined, drilled, etc. [Please select]
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If the plate is less than one-eighth of an inch thick the beveling is not necessary, as the edges may be melted all the way through without danger of leaving blowholes at any point. [Please select]
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