An ultra-small curve pipe jacking machine that can be your best friend when working in locations where surface excavations cannot be used to install underground pipes. Its distinct features are its minimum curve radius of 2.5m and high pressision （±0.2m of error at 12m from start）. Since its sale started in 1998, the machine has completed construction work at over 12,000 locations, and is still in active use for extending gas / water pipes to homes.

This is a tunnel method mainly used for polyethilane pipes, such as plumming and gas pipes.

-Models- ■the method of openpit NETIS Former Registration Number　[[[CB－990017－A]]] This is a retaining technique that employs an open-cut autonomous shield machine to continuously excavate, create foundation, install pipe, and fill vacuum. Compared with traditional methods, this technique allows for 1. A shorter construction period, 2. Higher economy with longer construction distance, 3. Good track record in tight construction sites, 4. The ability to use the same concrete secondary products as traditional methods – leading to being employed in more than 450 construction projects to date. No patent payments are necessary, nor does this technique require highly experienced engineers. We recommend considering this technique for locations and conditions that make construction by traditional methods difficult.