Excavator

['ekskəveɪtə] or ['ɛkskəvetɚ]

(noun.) a workman who excavates for foundations of buildings or for quarrying.

乔伊手打--From WordNet

(n.) One who, or that which, excavates or hollows out; a machine, as a dredging machine, or a tool, for excavating.

手打:兰斯洛特