This elevator traction institutions are two circularchain.
本提升机的牵引机构是两根环形链条。
2
It is a dynamic circularchain that formed by sequent lists and linked lists alternately.
该结构是由顺序表与链表交叉构造而形成的一种动态循环链表。
3
When there is on electrical power, slow descending control of circularchain ladder as well as to assure the reliability in use when set aside for a long time has to be solved.