China National Standards

China Petroleum netural gas GB Standards List

  •  China "Petroleum netural gas" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 21410-2015 Petroleum and netural gas industries—Downhole equipment—Lock mandrels and landing nipples
    石油天然气工业 井下设备 锁定心轴和定位接头    		 China National Standards
    Petroleum netural gas
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