Let the center of the global coordinates be chosen at the center of the shaft . 将总坐标的中心选于升降机井的中心处。
2.
Specification for powered domestic lifts with partially enclosed cars and no lift - well enclosures 部分封闭式梯箱无升降机井道护栏的住宅用电梯规范
3.
Lifts ; vertical sliding doors for small freight carrying lifts for lift shafts with walls of the fire - resistant class f 90 升降机.有防火等级为90f防火墙的升降机井中小型运货