The main work and production of the paper are as follows, (1) Longdiameter saturated steam pipes belong to active thermodynamic objects.
论文完成的主要工作及取得的成果如下： （1）大直径饱和蒸汽管道属于有源热工部件。
2
The morphological qualitative parameters were the ratio of longdiameter to short diameter. The two principal components contribute to 89.70% together.
第二个主成分只有长短径比，两种主成分能解释肌纤维变异量的累积比率达到了89.70％。
3
Many main vapor pipes in oil refineries have longdiameter and big weight, so the pipes often crack on the common supporters. A new sliding supporter is designed to solve the problem.