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See Chinese contents: GB/T 17396-2009 GB/T 17396-2009: Hot-rolled seamless steel tubes for hydraulic pillar service
This Standard specifies the dimension, appearance, weight, technical requirements, test methods, inspection rules, packing, marking and quality certificate of the hot-rolled seamless steel tubes for hydraulic pillar service. This Standard is applicable to hot-rolled seamless steel tubes for cylinder and pillar service for manufacturing coal mine hydraulic support and pillar. Other hot-rolled seamless steel tubes for hydraulic cylinder and pillar service may refer to this Standard.
