在壳体上安装齿轮箱，确保齿轮箱轴键妥当地固定在耦合键槽中。
Mount gearbox on housing, assuring that coup ling key slot accepts gearbox shaft key properly.
对变速箱中间轴键的强度进行了校核，提出了对中间轴脱键及键损坏等质量问题的改进措施。
This paper makes the strength check of gearbox's middle axle key, and advances the improving countermeasures for its quality problems such as running-off-key and key damaging of the middle axle.
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