Thaum lub tsheb crane siv cov khoom siv dov rau kev thauj khoom thiab tshem tawm, yuav tsum xyuas kom meej tias lub thickness ntawm lub dov bar yog zoo ib yam, yog li ntawd kev siv ntawm qhov ntau du, qhov dav ntawm qhov khoom yuav tsum yog 50 centimeters dav, txwv tsis pub hnav hnab looj tes los sau cov khoom. dov bar, nyob rau hauv thiaj li yuav tiv thaiv slipping.Hauv kev siv lifting cov cuab yeej loj ntauwd, yuav tsum koom tes nrog ntau tshaj ib lub winch sib koom ua haujlwm, kom winch winding ceev kom muaj kev sib xws, kom ntseeg tau tias tus pej thuam ntawm cov ntsiab lus quab yuam nyob rau hauv qhov sib npaug, kom tsis txhob muaj zog tsis sib xws thiab ua rau nqa cov khoom siv ntauwd deformation. .Nyob rau hauv kev siv txoj kev slewing los yog toggle txoj kev lifting, tus pej thuam hauv qab kom muaj kev ruaj ntseg, yuav tsum tau nruab ruaj los pab, offset lifting txheej txheem generated los ntawm kab rov tav thrust.