The driving gear and the driven gear are respectively provided with an open groove, and the glass sheet is fixed onto the open groove.

主动齿轮和从动齿轮上分别设置有开口槽，玻璃片固定在开口槽上。

youdao

Compared with the thyroid gland of grey mullet, the endostyle of amphioxus is primitive. It is an open groove and has lots of cillia adjacent to the pharynx lumen.

与鲻鱼甲状腺相比，文昌鱼内柱的结构更为原始，仅是部分区带演变为甲状腺激素分泌细胞，而其余区带仍与摄食相关。

youdao

Hollow shaft type high pressure cooling system is used to solve the problem in deep drilling, as well as gun-drill with open groove, proper cutting consumption and single tool withdraw are applied.

笔者主要阐述了数控深孔钻床在使用枪钻进行深孔加工时工艺参数的选择，寻求最佳加工性能，以求达到快速加工、提高效率的目的。

youdao