(nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps
jack ladder 片语
片语
ladder jack scaffold梯式脚手架
jack ladder tender插孔阶梯管理员
log jack ladder原木链条传送机
ladder-jack E scaffold挂梯式轻便脚手架
ladder r jack scaffold梯式脚手架
jack engine ladder软梯
jack ladder 例句
英汉例句
the invention relates to an apparatus used for maintaining a transmission facility, in particular to a jack ladder grapnel suitable for double-cracking type and four-cracking type divided conductors.