CHANGSHA -- China's self-developed tunnel boring machine with the biggest diameter has been rolled off the production line on Thursday. The machine, with a maximum excavation diameter of 16.64 meters, ...

A large-diameter tunnel boring machine (TBM) with a record-breaking excavation diameter of 16.64 meters rolls off the production line in Changsha, Central China's Hunan Province o ...

There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and annular cutters. 1. Twist drill bits. Especially in steel thicker than ...

When Rivian unveiled its next two models, the midsize R2 and more compact R3 in March of this year, one of the technical ...

In something straight out of a horror movie, scientists have found that Burmese pythons can open their mouths even wider than we previously thought. These snakes' enormous jaws may be able to open as ...

The world’s largest optical mirror was successfully installed on a support system prototype for the first time to validate ...

Rotating components, like shafts, and the supporting features like bearing housings, are good examples of features that must ...

China has completed the production of its largest tunnel-boring machine (TBM), measuring 16.64 meters (54.5 feet) in diameter. The machine is named Jianghai, which means "river and ocean" in Chinese.

A Colorado dealer recently submitted a British Proof coin that features an unintentional pairing of obverse and reverse, a ...

Rhythmic apparatuses must conform to specific norms and are officially inspected prior to competition. The interior diameter must measure between 80 and 90 centimeters (2 feet, 7 ½ inches and 2 feet, ...