【建筑】污物-调档机构

TRACTORS in soil-shifting work

soil-shifting machine, earthworking machine

using SUCTION for soil-shifting or dredging

mechanical SHOVELS for digging, soil-shifting, or loading

digging SCREW(S) for soil-shifting

THAWING in soil-shifting

SCRAPERS for soil-shifting or dredging

SKIMMERS for soil-shifting