Chuyển sơ đồ chữ thành câu hoàn chỉnh (sử dụng bị động)
|1. limestone, clay -> crusher -> powder
At the first stage in the production of cement, limestone and clay are crushed to create a powder.
|2. power -> mixer -> ...
3. ... -> rotating heater -> ...
This powder is then mixed before it passes into a rotating heater to be heated at high temperature.
|4. ... -> grinder -> cement
At the fourth stage of the process, the resulting material is ground (is put into a grinder machine) to create finished cement.
|5. cement -> be packaged -> bags
Finally, the cement is packaged in large bags and ready for the production of concrete.