All secondaryreinforcement may be lapped at the same location.
所有次要加固搭接可重叠在同一个位置。
2
A concept is provided that the supporting construction of rock bolt system consists of key, secondaryreinforcement and quasi-plastic supporting structures. And their interactions are analyzed.
During the period of 1953-1957, the curriculum position of labor and technical education was established along with reinforcement of labor and technical education at primary and secondary schools.