... 3.Drill efficiency 4.ISO9001:2000 Trench excavator in planting Character1. This trench excavator and tractor kit ... land, frozen soil, the ice punch. Widely used in gardens, planting, plant trees,geophysical exploration, road construction, ... operation is not less than 80 per hour a pit,.10.according to work 8 hours a day ... calculation, and a day to dig a pit in 640, is the artificial of more than 30 ...