No Operation Keys 无操作按键
Operation Control Keys 工序控制码
Keys Operation 按键操作
Keys operation force 按键操作力
The keys of operation 手术操作要点
The bulk of the Ruby class Calc USES Ruby's metaprogramming features to define functions at run time for all the digit keys and for the math operation keys.
大多数Ruby类Calc使用Ruby的元编程功能，在运行时为所有数字键和数学操作键定义功能。
The solution is to check the computer and test machine communication line is off; check the online selection of sensor is correct; check the last test or operation keys.
解决方案是检查计算机与试验机的通讯线是否脱落；检查联机选择传感器是否选择正确；检查最近的试验或操作键。
A basic operation in the module is to view what keyrings a process is subscribed to and what keys and other keyrings those keyrings contain.
模块中的一个基本操作是查看一个进程与哪些keyring相关联，以及这些keyring包含哪些密钥和其他keyring。
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