Double girder gantry crane yachititsa kuti msika ufunike kwambiri chifukwa cha kuchuluka kwa malo ogwiritsira ntchito, kuchuluka kwa magwiridwe antchito, kusinthasintha kwakukulu komanso kusinthasintha kwamphamvu, kupangitsa kuti ntchito zotsitsa ndikutsitsa m'mafakitale monga omanga zombo, zonyamula katundu, ndi madoko zikhale zosavuta. Ndi o...
Werengani zambiri