简要介绍了TP64GK型棚车及其存在的问题，提出了将其性能由60t级升级到70t级的升级设计方案、运用中存在问题的解决措施及相关计算分......

介绍了70t级石灰石漏斗车的结构特点、技术参数、相关计算。...

Personally participating in the October 1 National Day 70th Anniversary celebrations,there are some observations that I ......

The year 2019 marks the 70th anniversary of the founding of the People’s Republic of China,and grand national celebrati......