C317 The Top of the World

Zhangjiakou's set of high-precision processing equipment was a domestic five-axis machine tool that Nie Minhui had bought for him before, and its former processing accuracy had not even reached the requirement of 0.5 micron, which was still dozens of times inferior to the world's top military-grade 0.01 micron. However, after this set of equipment reached Zhang Yunfeng's hands