Earth Nail Machine

Earth Nail Machine, I do not know the real name, but that's what it's called in my country. I took this picture with a mobile camera asus zenfone 2 5.5".
The portrait of the construction workers who were planting the foundation of the building into the ground without the need to dig, this machine will stick the foundation pole along the more than 10 meters into the ground.
Magically this machine works without making sound of bang. I have ever seen kind of machine, but it really makes the noise and vibration noise strong in the area around the building.The location in this photo is housed in a training and education center in North Sumatra - Medan.

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