extension ladder 绝缘梯
Alluminum double side extension ladder 铝合金双伸梯
Aluminum extension ladder 很长的一个梯子
way extension ladder 三效伸缩梯
an automatic extension ladder 自动伸缩梯
extending ladder extension ladder 伸缩梯
Sad track extension ladder memories 悲伤的轨迹延阶梯回忆
Ladder feet are in good condition, e. g. rubber tips on metal rolling ladders. "Safe-Hi" feet on extension ladders.
梯子脚底是否有很好的止滑垫片。如金属梯子脚底的橡胶，延伸梯的防滑垫片。
The concept of ladder plane partition is introduced which may be regarded as a natural extension of the shifted one.
作为移位平面分拆的自然拓广，本文引入了梯形平面分拆的概念。
The invention provides a self-locking extension working platform of a lifting working ladder, wherein the extension working platform has self-locking function.
本发明提供了一种升降工作梯的延伸工作平台，其延伸工作平台具有自锁功能。
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