Ib, qauv txuj ci

Cov kab txiav hlav siv 4 qhov tseem ceeb ntawm txoj cai, qhov kev sib tw, kev ncua, thiab theem ua haujlwm sawv cev rau tus qauv.

Ob tug, cov leb kauj vuam txwv txiav

Cov cim no yog: MDG, MDE, MDZ, MDN, MDP, MDS.

Xws li: MDN tib lub kauj vuam kauj gantry crane pas ib qho khoom ntiag tug;

MDS - ib qho nkag mus rau hauv lub vev xaib nrog peb lub tsheb.

Peb, ob chav beam gantry crane

Cov cim yog: MG, ME, MZ, MC, MP, MS.

Xws li: MG - ob chav beam tib lub tsheb nqus qhov rooj hom crane;

KUV - ob chav beam ob lub tsheb hook qhov rooj hom crane