About product and suppliers:
            673 tunnel boring machine products are offered for sale by suppliers on Alibaba.com, of which pipe jacking machines accounts for 27%, mine drilling rig accounts for 19%, and wrapping machines accounts for 1%. 

A wide variety of tunnel boring machine options are available to you, such as coal, ore. 

There are 673 suppliers who sells tunnel boring machine on Alibaba.com, mainly located in Asia. The top countries of supplier is United States, from which the percentage of tunnel boring machine supply is 1% respectively.