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针对用液体涂料对中、小口径管道进行管内涂敷困难的特点，成功地研制出管内防腐一次成膜的新技术。经改进后进行实际管内涂敷表明，其各项指标均达到设计要求。相应的设备具有轻便和操作容易等优点。简述了该设备的工作原理、工艺流程、技术指标和改进情况。
Aiming at the difficulty of coating the medium and small diameter pipes with liquid paint in the tube, a new technique for forming a film in the tube with anticorrosion was successfully developed. After the improvement of the actual tube coating shows that its indicators have reached the design requirements. The corresponding equipment has the advantages of light weight and easy operation. The working principle, technological process, technical index and improvement of this equipment are briefly described.