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API SPEC 5L GrBQ/X42O/X46Q/X52O/X56O/X60O/X65O/X70O/X80O Steel Line Pipe, Find Details and Price about API Pipe Line Pipe from API SPEC 5L GrBQ/X42O/X46Q/X52O/X56O/X60O/X65O/X70O/X80O Steel Line Pipe - Zhejiang Chanyat Power Engineering Co., Ltd.