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API Sucker Rod 7/8" X 30 FT Grade D AISI 4142 Fs/T Coupling, Find Details and Price about API Sucker Rod 7/8" API Sucker Rod 7/8" X 30 FT Grade D from API Sucker Rod 7/8" X 30 FT Grade D AISI 4142 Fs/T Coupling - Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.