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Patent US20100122641 - Dual purpose bitumen/diluent railroad tank car
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Prototype railroad topics: the anatomy of a tank car
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Patent US20100122641 - Dual purpose bitumen/diluent railroad tank car
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Patent US6357363 - Railroad tank car - Google Patents
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Patent US6357363 - Railroad tank car - Google Patents
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Patent US2907284 - Railway tank car - Google Patents

Prototype Railroad Topics: The Anatomy of a Tank Car - General American
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Patent US3766862 - Railroad tank car - Google Patents
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Illinois Railway Museum's CTA History Website
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Patent US3884373 - Apparatus and system for unloading railroad tank car
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Patent US2907284 - Railway tank car - Google Patents