China : Super-large-diameter shaft boring machine rolled off production line
https://www.youtube.com/watch?v=onFEkstNJ9o Xinhua news agency report on November 29 first super-large diameter vertical boring machine. China Railway Construction Heavy Industry (CRCHI) Group and China Railway 15th Bureau Group design de...Party Committee and Chairman of the China Rail...China : Super-large-diameter shaft boring machine rolled off production line
https://www.youtube.com/watch?v=onFEkstNJ9o Xinhua news agency report on November 29 first super-large diameter vertical boring machine. China Railway Construction Heavy Industry (CRCHI) Group and China Railway 15th Bureau Group design de...Party Committee and Chairman of the China Rail...
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