Ciro Santilli $$ Sponsor Ciro $$ 中国独裁统治 China Dictatorship 新疆改造中心、六四事件、法轮功、郝海东、709大抓捕、2015巴拿马文件 邓家贵、低端人口、西藏骚乱
🔗
🔗
Video 35. Source.
🔗
Great overview of the earlier history of unit standardization.
🔗
Gives particular emphasis to the invention of gauge blocks.
🔗
🔗

Ancestors

🔗