ladder stand是什么意思

用法例句

In the revamp design of Xishan railway loading jetty of PetroChina Dalian Petrochemical Company, the maximum number of hoses and installation of detachable ladder were studied.

通过大连石化分公司西山铁路装卸车栈桥改造项目的设计,对12 m铁路槽车一个车位最多可布置的鹤管数量和活动梯安装进行了研究。