After 15 years of construction work, the 9.5-meter (31-foot) wide drillingmachine will bore through the remaining 1.5 meters of rock to join two ends of the tunnel some 2,000 meters under a mountain.
This new model of drillingmachine can bore through solid rock ten metres deep.
这台新型钻机能钻透十米厚的坚固岩石。
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TPY-30 drillingmachine is a type of shallow-hole drillingmachine for exploration, it is suitable for drilling in soil, sand soil and medium harden rock drilling.