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.
参展商类别主要包括：机械类46家，紧固件类94家，轴承、弹簧类25家，机电设备类18家，模具类9家，其他类22家。
Exhibitor categories include: machinery 46, fastener 94, bearings, springs class 25, class 18 mechanical and electrical equipment, mold class 9, and others 22.
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