名词
中文翻译：助手型机车
同义词：
['assistant locomotives', "assistant locomotive例句：1. The engineer's assistant was responsible for the maintenance of the train.（工程师的助手负责维护火车。）"]
例句：
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1. The engineer's assistant was responsible for the maintenance of the train.
工程师的助手负责维护火车。
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2. The new assistant locomotive has been put into service.
新助手型机车已投入使用。
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3.The assistant locomotive was designed to improve efficiency in heavy-duty operations.
助手型机车旨在提高重载作业的效率。