The achievement of PQF-Technology marks development and perfection of the MPM Technology, and it has also placed a full-stop to the course of the mandrel tube rolling technology in recent 100 years.

• PQF轧管工艺的成就标志着MPM轧管工艺的发展完善,也为长芯棒连轧管工艺近百年的历程画上了句号。