jack ladder
参考词典中jack ladder的常规释义：
基本释义
- 索梯，木踏板绳梯
英英解释
1个名词解释
- (nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps
[同] jack ladder, jacob's ladder, pilot ladder
点击查看……- (nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps
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