[1] Lub dragline tau tsim nyob rau hauv 1904 los ntawm John W. Nplooj ntawv ntawm nplooj ntawv Schnable Contracting rau siv khawb Chicago Canal. Xyoo 1912 nws tau los ua Lub Tuam Txhab Tuam Txhab, thiab txoj kev taug kev tau tsim ob peb xyoos tom qab, muab cov kev txav mus los.
Leej twg invented the dragline?
John W. Page tau tsim lub dragline hauv xyoo 1904. Ib qho kev taug kev tau tsim ob peb xyoos tom qab, tso cai rau kev txav mus los tsis muaj kev sib tw thiab cov menyuam, thiab tau txais los ntawm Chicago. -based Page Engineering Company hauv xyoo 1920s. Lub tuam txhab tau tshaj tawm nws qhov nrov 600-series draglines nyob rau nruab nrab-1930s.
Dragline excavators siv rau dab tsi?
A dragline excavator yog ib yam khoom hnyav siv hauv civil engineering, deg mining thiab excavating. Ib tug loj excavator siv ib tug dragline los rub lub thoob los ntawm ib tug hlau cable. Tus neeg teb xov tooj txo lub thoob mus rau cov khoom uas yuav tsum tau khawb.
Puas yog lawv tseem ua cov cab?
Draglines niaj hnub
Giant draglines tau ntev los lawm, tab sis dragline excavators tseem siv ntau heev.
Tus nqi rub tawm ntau npaum li cas?
Ib txoj kab loj loj siv hauv qhov qhib qhov mining kev lag luam raug nqi kwv yees US$50–100 lab.
