JUS M J2 105-1985 Equipment forpetroleum and naturalgas industries Cas -ng and tubing for oil or natura!gas vvells《石油天然气工业材料及设备 油气井铸铁管道》.pdf

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AQ 2012-2007 石油天然气安全规程.pdf

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SY 0470-2000 石油天然气管道跨越工程施工及验收规范.pdf

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