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1.The live-roller conveyer is an essential tool for moving heavy materials.
生活滚筒输送器是搬运重物的重要工具。
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2.The engineer designed the live-roller conveyer to improve efficiency in the factory.
工程师设计了生活滚筒输送器，以提高工厂的效率。
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3. The live-roller conveyer was used to transport goods from one warehouse to another.
生活滚筒输送器被用来从一个仓库运输货物到另一个仓库。