Aluminum alloy is mainly composed of aluminum, with other trace metal elements added, magnesium alloy is mainly composed of magnesium...
Aluminum alloy is mainly composed of aluminum, with other trace metal elements added, magnesium alloy is mainly composed of magnesium...
On September 20, the Long March 7 Y4 carrier rocket carrying the Tianzhou-3 cargo spacecraft was successfully launched at the Wenchang Launch Center in Hainan.