2008 year China issued GB standards list |
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GB/T 21434-2008 Phase change boiler
相变锅炉 |
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GB/T 21442-2008 Farrer’s scallop
栉孔扇贝 |
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GB/T 13023-2008 Corrugating medium
瓦楞芯（原）纸 |
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GB/T 21387-2008 Aaxial flow check valve
轴流式止回阀 |
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