YangHaiHang

With the rapid development of the railway market, the requirements for standards have increased. In order to ensure the rapid excavation of long tunnels, increase the safety factor of operators, reduce the number of operators, and reduce labor intensity, it is best to use rock drilling rigs for

With the rapid development of Chinas high-speed railway construction，the construction standards continue to increase． In order to ensure the rapid excavation of long and large tunnels，to ensure the safety of operators，to reduce the number of operators，and to reduce labor intensity，