您需要岩塞吗？先生。

Do you need nuts, Sir?

youdao

证明岩塞爆破新技术在本工程中得到了较好的应用。

All these prove that the rock plug blasting has been effectively used in this project.

youdao

证明岩塞爆破新技术在本工程中得到了较好的应用。

All these prove that the rock plug blasting has been effectively used in this project.

youdao