因此，过热器的使用年限全取决于管头的腐蚀速度。
Therefore the service life of superheater is mainly dependent on the corrosion speed of tube top.
提出的管头定位法有利于各种复杂要求的管线铺设。
Based on a method of positioning by the nodule of pipeline, various pipeline laying can be conveniently realized.
为了解决无缝钢管管头切割的问题，设计、研制了管头切割机。
In order to solve the problems of shoe cutting of seamless tube, the shoe cutter is designed and developed.
应用推荐