WT1 – Cement and Concrete 5

The diagram below shows the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.

Chuyển sơ đồ chữ thành câu hoàn chỉnh (sử dụng bị động)

1. cement, water, sand, gravel -> % prepare -> ...

2. ... -> concrete mixer -> concrete