Appearance of the gripper for the control bars?

该酒吧的控制手爪的外观？

Gripper Device on a printing press for holding the sheet.

印刷机上用来把纸抓牢的装置。

Gripper: Device on a printing press for holding the sheet.

夹牙：印刷机上用来把纸抓牢的装置。

Several kinds of sensors are installed in the robotic gripper.

机器人手爪上装有多种传感器。

Upon application of a vacuum, gripper hardens and holds the object.

经过真空作用，手爪变硬，然后抓住物体。