About product and suppliers:
            4,522 china underground tunneling machine products are offered for sale by suppliers on Alibaba.com, of which mine drilling rig accounts for 15%, pipe jacking machines accounts for 2%, and shotcrete machine accounts for 1%. 

A wide variety of china underground tunneling machine options are available to you, 

There are 4,522 suppliers who sells china underground tunneling machine on Alibaba.com, mainly located in Asia. The top countries of supplier is China, from which the percentage of china underground tunneling machine supply is 100% respectively.