Many openers have a magnet or set of clamps to grip the open lid.
许多开启器是用磁铁或夹具来夹紧要开启的盖子。
《柯林斯英汉双解大词典》
2
Open and close your fingers or flex your wrist between each grip.
每次抓握的间歇都尝试活动手指及手腕。
3
The force-feedback or haptic controller is a pistol-grip design with a trigger to activate movement and a thumb-controlled side button to open or close the gripper.