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YBT 9256-96 steel structure pipeline coating technical specification

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JBZQ 4170-2006 Welding design specification

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JBT 7850-1995 Hand clamp quick change joint

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JBT 4746-2002 Heads for steel pressure vessels

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JBT 2932-1999 Technical conditions for water treatment equipment

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HGT 21515-2005 Atmospheric manhole

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GB-T706-2008 hot rolled section steel

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GBT 28743-2012 General technical conditions for sewage treatment container equipment

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GBT 26747-2011 Composite tank for water treatment plant

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