最終更新日：2024/08/02
The beam engine was a type of steam engine used in the 18th and 19th centuries.
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The beam engine was a type of steam engine used in the 18th and 19th centuries.
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The beam engine was a type of steam engine used in the 18th and 19th centuries.
The beam engine was a type of steam engine used in the 18th and 19th centuries.
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