FG：前挡

“Front Gear”在日常使用和书面表达中常被缩写为FG，这种简洁的写法有助于提高信息传递的效率。FG作为一个通用术语，广泛应用在机械、汽车、运动器材等多个综合性领域，泛指各类设备中位于前方的齿轮或挡位装置。其中文对应的含义是“前挡”。通过使用缩写，不仅书写更加便捷，也便于跨行业的沟通和理解。

The problems such as noise, abnormal sound, heat and lubricating oil leakage of front gear box of DF 8B locomotive are analyzed in detail.
对东风8B型机车前变速箱存在的噪音、异音、发热和机油泄漏等问题，进行了详尽的分析。
Life Testing Research of Fixed Installation Protruding Hob to Cut Milling Front Gear(FG) of Excavating Coal Machine
切制采煤机磨前齿轮固定安装突起滚刀寿命试验研究
Failure analysis and structure design improvement of front gear box of DF_ ( 8B ) locomotive
东风（8B）型机车前变速箱故障分析及结构设计改进
Engine noise source identification is essential for making noise reduction strategies. Predominant noise sources of engines are normally identified as some cover components such as oil pan, valve cover and front gear cover etc.
发动机噪声源识别对于制定发动机降噪措施十分重要，而像油底壳、气门罩、前齿轮室盖等罩壳类零件通常是发动机的主要噪声源。
It discussed the method to design, manufacture and use fixed installation protruding hob to process milling front cylindrical gear of excavating coal machine.
论述了设计、制造和使用固定安装突起滚刀加工采煤机磨前圆柱齿轮的方法。

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