A new-style foundationless-tunnel dynamic electronic railway track scale with high precision is introduced in this paper.
介绍了一种新型无基坑式高精度动态电子轨道衡。
The first application of PGB-free well drilling technology in China’s offshore oil development;
无基盘钻井技术在我国海上油气田开发中的首次应用
Copyright © 2022-2024 汉字大全www.hanzidaquan.com All Rights Reserved 浙ICP备20019715号