new austrian tunnelling method (natm)造句

• Especially new austrian tunneling method ( natm ) construction has sometimes been adopted in highway tunnel project , which has been applied only 20 years in our country , and people are probing into and practicing it
  特别是高速公路隧道工程往往采用新奥法施工，其应用在我国仅仅二十来年的时间，人们对新奥法的认识，处于探索与实践中。