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。
For the flexible scheduling problem of complex single product, a new hierarchical scheduling algorithm is presented based on improved processing operation tree model.
对复杂单产品柔性调度问题，本文在改进加工工艺树模型的基础上，提出一种新的分步式求解算法。
The utility model has the advantages of simple structure, flexible operation, high safety and beautiful appearance. The utility model can be widely used in various situations.
本实用新型结构简单，操作灵活，使用安全，外形也很美观，可以广泛用于各种场合。
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