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- HB 4-7-1999 变径直通管接头
- HB 4-7-1999
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- HB 4-7-1983 变径直通管接头
- HB 4-7-1983
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- HB 4-7-2002 扩口式变径直通管接头
- HB 4-7-2002
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- HB 4-6-1983 带凸缘直通管接头
- HB 4-6-1983
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- HB 4-6-1999 带凸缘直通管接头
- HB 4-6-1999
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- HB 4-6-2002 扩口式带凸缘直通管接头
- HB 4-6-2002
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- HB 4-5-1999 Ａ型直通管接头
- HB 4-5-1999
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- HB 4-5-2002 扩口式A型直通管接头
- HB 4-5-2002
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- HB 4-5-1983 Ａ型直通管接头
- HB 4-5-1983
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- HB 4-4-1999 直通管接头
- HB 4-4-1999