解决了滤油难的难题。

Solve the problem of the filter oil difficult.

youdao

填补了国内空白，他是滤油时代的划时代的进步。

Fill a blank in China, he is the oil age epoch-making progress.

youdao

填补了国内空白，他是滤油时代的划时代的进步。

Fill a blank in China, he is the oil age epoch-making progress.

youdao