名词
中文翻译：颈部下降式上升器
同义词：
['neck-down spool', 'neck-down riser', 'neck-down sprocket']
例句：
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1.The engineer used a neck-down riser to connect the two pipes together.
工程师使用一个颈部下降式上升器将两根管道连接起来。
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2. The machine's neck-down riser was designed to prevent jamming during operation.
机器的颈部下降式上升器设计成在操作过程中防止卡住。
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3. The carpenter used a neck-down riser to make the wooden beam stronger.
木匠使用一个颈部下降式上升器使木梁更坚固。