但是我读了许多书，看到过4张图片三爪卡盘。

I have however read a lot of books and have seen pictures of 4-jaw chucks.

youdao

但是我读了许多书，看到过4张图片三爪卡盘。

I have however read a lot of books and have seen pictures of 4-jaw chucks.

youdao