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1.The trolley stopper is designed to prevent the trolley from moving when it stops at a station.
这个手推车停止器的设计是为了防止手推车在停靠站点时移动。
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2. The trolley stopper was installed to improve safety during the construction of the new subway line.
这个手推车停止器被安装是为了提高新地铁线路建设期间的安全性。
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3.The trolley stopper has been tested and proven to be effective in reducing accidents caused by improper handling of heavy loads.
这个手推车停止器经过测试并证明能有效减少因不当处理重物导致的事故。