Steel tubes and fittings for on and offshore pipelines - internal coating for the reduction of friction for conveyance of non corrosive gas 海上和近海管道用钢管和配件.降低无腐蚀气体运输摩擦的内涂层
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Steel tubes and fittings for on and offshore pipelines - internal coating for the reduction of friction for conveyance of non corrosive gas 岸上及海底管道用钢管及配件.非腐蚀性气体的输送用减少摩擦的内涂层
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Steel tubes and fittings for on and offshore pipelines - internal coating for the reduction of friction for conveyance of non corrosive gas ; german version en 10301 : 2003 海上和近海管道用钢管和配件.降低无腐蚀气体运输摩擦