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78. What term is used to represent the bulkhead type used for tank boundary bulkheads?
Oiltight bulkheads are specifically designed to prevent oil passage and form the boundaries of oil tanks. Watertight bulkheads prevent water passage, airtight bulkheads prevent air passage, and non-watertight bulkheads are unsuitable for liquid retention. Therefore, oiltight bulkheads are the correct term for tank boundary bulkheads.
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