China National Standards

China Bolted bonnet steel GB Standards List

  •  China "Bolted bonnet steel" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 12234-2007 Bolted bonnet steel gate valves for petroleum and natural gas industries
    石油、天然气工业用螺柱连接阀盖的钢制闸阀    		 China National Standards
    Bolted bonnet steel
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