Chinese mask demand is strong, but raw material polypropylene prices fall

Chinese mask demand is strong, but raw material polypropylene prices fall

The proportion of polypropylene raw materials used in masks is too small, and the demand for polypropylene in this outbreak is limited. Under the strong demand for masks, the price of raw material polypropylene did not rise but fell. S...
The world of graphene is always full of surprises, and 97.8% of the capacity can be maintained after

The world of graphene is always full of surprises, and 97.8% of the capacity can be maintained after

On February 19, foreign media reported that a recent study published in the British journal "Nature · Energy" showed that scientists had used the previous findings to create a new graphene folding device that can store energy. In 2018, t...
What do You Know about the Failure of Air Compressor Lubricating Oil

What do You Know about the Failure of Air Compressor Lubricating Oil

As the main force to help the machine lubricate, reduce friction, and extend the service life of the device, lubricating oil plays a vital role in the operation of the invention....
Do you know that the earliest bearings regarded more than  thousand years ago?

Do you know that the earliest bearings regarded more than thousand years ago?

An early shape of linear movement bearing turned into a row of wood poles under a row of skid plates. Present-day linear movement bearings use the same working principle, but from time to time, balls are used in place of rollers. The most si...