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- HG/T 3195-2009 石墨四通
- HG/T 3195-2009
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- HB 6055-6057-2008 21MPa无扩口拧入式四通管接头
- HB 6055-6057-2008
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- HB 6052-6054-2008 21MPa无扩口C型变径四通管接头
- HB 6052-6054-2008
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- HB 6049-6051-2008 21MPa无扩口B型变径四通管接头
- HB 6049-6051-2008
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- HB 6046-6048-2008 21MPa无扩口A型变径四通管接头
- HB 6046-6048-2008
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- HB 6043-6045-2008 21MPa无扩口四通管接头
- HB 6043-6045-2008
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- HB 7871-2008 28MPa无扩口拧入式四通管接头
- HB 7871-2008
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- HB 7870-2008 28MPa无扩口C型变径四通管接头
- HB 7870-2008
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- HB 7869-2008 28MPa无扩口B型变径四通管接头
- HB 7869-2008
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- HB 7868-2008 28MPa无扩口A型变径四通管接头
- HB 7868-2008