I would have to say that is an 'l' -shaped bracket.

我不得不说，这是一个“L”状的支架。

youdao

The end of the upper cover is connected with the U-shaped bracket by a shaft, which is used for applying the force on the upper cover by users and then transferring the force to the punch.

上盖，其末端与此U型支架相轴接， 用来让使用者施力于此上盖上再将力传递至此冲子；

youdao

Custom L-shaped lounge benches bracket this space and can be rolled away to allow for other USES and activities.

定制的L型长椅各自摆放，可根据需要排列以供其他用途和活动而用。

youdao