The appearance of the nonmetallic compound pipeline has sought out a efficient path for the problem settling.

非金属复合管道的出现，为解决这一课题找到了一条有效途径。

youdao

The appearance of the nonmetallic compound pipeline has sought out a efficient path for the problem settling.

非金属复合管道的出现，为解决这一课题找到了一条有效途径。

youdao