潜水电机壳体，包括机架，尾轴承架，法兰和罩盖总装，必须采用符合美国材料试验协会ASTM A - 48类别30标准的、密实的铸铁或更好的材料制造。
The submersible motor enclosure including frame, end brackets, flanges and cap assembly shall be constructed of close-grained cast iron, ASTM A-48, Class 30 or better.
顶部尾轴承架应该配置不锈钢吊环，应该能够支撑泵和电机的总重量的压力。
The top end bracket shall be fitted with a stainless steel lifting bail and shall be capable of supporting the combined weight of the pump and motor.
顶部尾轴承架应该配置吊环，应该能够支撑泵和电机的总重量四(4)倍的压力。
The top end bracket shall be fitted with a lifting bail and shall be capable of supporting four (4) times the combined weight of the pump and motor.
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