Mines in West Africa, Sierra Leone capital Freetown 270 km south-east, close to Moyamba and state areas near the Atlantic coast Xiebu Luo Island, Sierra Leone alluvial placer generation in the Tertiary and Pleistocene expected exploitation of …
The European Union has recently adopted a new regulation that will impose more stringent standards on the use of HFCs tha…
The conventional configuration of the tanker was a special oil pump equipped with a pump into the pumping pipe. This pipe is made of Wuhan carbon steel and 304 stainless steel, and the tank (oil tank) is generally 5 cubic meters. To 30 cubic meters,…
Into the hot summer, the auto market entered the ice cave. Due to the arrival of the off-season in the traditional auto market, mar…
Whether it's agricultural professionals or ordinary people living in the city, we have a lot of opportunities to get in touch with plants, and leaves are the most part of the plant, so we know very well about the leaves. In general, except for some succulents, most of the pla…