holder spring
... holder in due course ==> 法定持有人,正当持票人 holder spring ==> 夹持器弹簧 holder up ==> 铆钉撑锤 ...
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弹簧确保夹持器在断电时不会使有效负荷掉落。
The spring ensures the gripper will not drop its payload in the event of a power outage.
youdao
气压打开夹持器，弹簧关闭夹持器。
Air pressure opens the gripper and a spring is used to close the gripper.
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