Planetary roller screws are emerging as a critical—and costly—component in next-gen robots. China is racing ahead in controlling their supply.

However, light-line specialists who keep the spinning reel in their hands all day will attest that more is definitely better when it comes to bearings. Spinning reel size is primarily dictated ...

As one of the most common geological disasters, rockfalls seriously threaten the safety of linear projects such as roads, railways, and oil and natural gas pipelines. The rigid protective structures ...