用于道路养护、建筑和采矿中平整大型表面的机器。
用于道路养护、建筑和采矿中平整大型表面的机器。；分级者；进行分级或辅助分级的工具。
用于道路养护、建筑和采矿中平整大型表面的机器。
A machine used in road maintenance, construction, and mining for leveling large surfaces.
用于按大小或质量分选食品的机器。
A machine used to sort food by size or quality.
分级者；进行分级或辅助分级的工具。
One who grades, or that by means of which grading is done or facilitated.
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