| http://www.w3.org/ns/prov#value | - In the present embodiment having such a construction as described above, when such a slope face excavating operation of an aimed slope face angle a as shown in FIG. 12 is performed semi-automatically using the hydraulic excavator, in the system according to the present invention, such semiautomatic control functions as described above can be realized by an electronic hydraulic system which automat
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