primary lifting elevator

例句：

1. 1.The primary lifting elevator is used to transport heavy loads from one floor to another.
   初级提升电梯用于将重物从一个楼层运送到另一个楼层。
2. 2. The primary lifting elevator is equipped with a safety mechanism to prevent accidents.
   初级提升电梯配备了安全机制以防止事故。
3. 3.The primary lifting elevator has a capacity of 500kg and can be used for both residential and commercial purposes.
   初级提升电梯的容量为500公斤，可用于住宅和商业用途。