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服役后的抽油杆在检测后需要进行表面处理，使用高效、节能、常温发黑技术，研制了一套高效、节能、防腐系统──全封闭式全自动常温发黑装置。
After service, the sucker rod needs to be surface-treated after testing. A highly efficient, energy-saving and anti-corrosion system has been developed using an efficient, energy-saving and room temperature blackening technology.