n.拉索；拉铲挖土机；绳斗电铲；挖掘斗

These design alterations form the basis for the machine's extreme dynamism in hard dragline operations. 这些设计变更形成了该机器在艰苦索斗铲作业时的特殊物力基础。

The selection of dragline is a key problem to be handled when applying dragline for open cast in surface mining. 露天矿应用拉斗铲倒堆工艺的关键问题首先要做好拉斗铲的选型。

Araneus diadematus dragline silks are studied.The assemble and shape structures of the dragline silk is analyzed . 以大腹圆珠牵引丝为研究对象,分析了蜘蛛丝的聚集态结构特征和形态结构特征。

Several types of spider silk, i.e. dragline silk and capture silk, and silkworm silk are compared. 蚕丝与蜘蛛丝的一些型态，如牵引丝与补抓丝之间的比较。

Dragline silk, which spiders use to drop themselves down and which form the “spokes” on a web, are five times as strong, by weight, as steel. 新的人造蜘蛛丝用途将极为广泛，包括用来制造防弹衣及外科手术用的缝合线。

Finally, decreasing the revolution angle and increasing the bucket fill factor are effective ways to improve the operation efficiency of dragline. 减小拉斗铲作业回转角和加大拉斗铲斗容的满斗系数是提高拉斗铲作业效率的有效途径，为国内外拉斗铲的研究提供了具体的分析方法和理论依据。