Earth pressure balance ( EPB ) shield is used most extensively in shield construction.
.Shield tunneling is more and more popular during the construction of urban subway engineering.
There are many famous company produce this machine, such as NFM. It was called ITBM cutting blades.
There are big quantity cemented carbide blades in the shield machine.
Producing many different types of stud blade for tunnel making
in a shield machaine, ther are three parts: cutting edtge, bearing structure, lining parts. Cemented carbide blades is most used as cutting edge because of its long life time.