Althoughthe era of full-screen has arrived, due to the existence of the front cameramakes the screen can not be displayed in full, cell phone manufacturers have tomake a variety of holes in the screen. With the advancement of technology, theunder-scr…
In this article, the physical foaming agents of carbon dioxide foaming agents and hydrochlorofluorocarbon foaming agents will be talked about.…
The global economy in the post-epidemic era is recovering upwards, coupled with loose global monetary and fiscal policies, leading to an overall increase in global commodity prices, including steel. Although the prices of raw materials such as iron o…
Amorphous graphite, earthy graphite, microcrystalline graphite and black lead powder. Amorphous graphite does not really have no graphite crystals as its name suggests, but its crystals are too small and have a microcrystalline structure. X-ray analy…