我国自五十年代末六十年代初开始手提式挖穴机的研究和试制,已陆续研究出多种型号的样机,有的已小批投产。尽管挖穴机的整地工效可比人工高出5～7倍,但在实际生产上并未得到很好的推广应用。原因是多方面的,除产品价格高、制造 In China, research and trial production of portable tunneling machines began in the late 1950s and early 1960s, and many types of prototypes have been successively studied, and some have been put into production in small batches. Although the ergonomics of the digging machine can be 5 to 7 times higher than that of the artificial one, it has not been widely used in actual production. The reasons are many, except for high product prices and manufacturing