最终得到的新型塑料合金轴承材料力学性能可达到或超过美国国防部颁布的MIL - B - 17901(船舶)军用标准。

Then the new material for BTG water lubrication plastic alloy bearings is get. Its mechanic capability should attain or exceeded MIL-B-17901B standard (shipping) issued by US DOD.

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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.

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