GB/T 3289.8-1982 可锻铸铁管路连接件型式尺寸 45°月弯45°内外丝月弯45°外丝月弯 Malleable cast iron pipe fittings--Type size--Lo
标准简介
GB/T 3289.8-1982 可锻铸铁管路连接件型式尺寸 45°月弯45°内外丝月弯45°外丝月弯 Malleable cast iron pipe fittings--Type size--Long sweep bends 45°，male and female long sweep bends 45°,male long sweep bends 45°
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