In case of aerial applications, this cable can be adapted for self-supportingstructure with cable slack.
用于架空时，这种光缆还可以做成带松垂光缆的自承式结构。
2
The utility model is characterized in that the self locking type air spring has the functions of supporting and adjusting height, and the operation is flexible and the structure is relatively simple.
自锁型气弹簧同时具备支撑、调节高度的功能，而且操作十分灵活，结构相对简单。
3
The authors introduced several supporting structures of tube bundles of tube-shell heat exchangers, especially the new self-support structure.