Template:Motd/2011-08-20 (zh-hans)

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挖掘机,土石方开挖机械。台湾称“铲斗机”,俗称鸡头或反铲。因其多工性,为建筑工程最常见的机械之一。 挖掘机机身下盘为履带车轮,上盘为动力机身,前装固定桁架,架上装置铲臂,可以俯仰,铲臂前端为铲斗,作业时,将铲斗贴向地层,以铲臂施力向前铲挖,土方即进入斗内,机身旋转,使铲斗就弃土位置,将铲斗底盖开启,土方即自行卸落,完成一次铲行为。

This is the Simplified Chinese translation of the Media of the day description page from .

Descriptions in other languages:

Motd/2011-08-20 (de) Motd/2011-08-20 (en) Motd/2011-08-20 (fr)
Motd/2011-08-20 (ro) Motd/2011-08-20 (zh-hans)