it can be used in the construction in such circumstances as construction, ground, courtyard, roadbed, pile, groove, field and na The product can be widely applied in tamping and flattening all sand, gravel, tibia, bituminous gravel, concrete and clay, particularly, it can be used in the construction in such circumstances as construction, ground, courtyard, roadbed, pile, groove, field and narrow grounds. It is able to work with electricity where there is power off, and accomplish the construction task that cannot be achieved by big and medium-size machines. Accomplish the construction task that cannot be achieved by big and medium-size machines.