Process control is under the influence of all parts of loop, but the most direct and apparent part is the final element i. e. control valve.

过程控制中的各个环节对控制都有影响，而最终环节即调节阀对过程控制的影响最为直接和明显。

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The lawyer said he would display emails and other correspondence that showed Jobs was active in the company's efforts to control e-book prices as Apple was preparing to launch the iPad.

WSJ: US blames Apple for 2010 run-up in e-book prices

Online sales account for only 1% of retailing, and the chains and specialty shops that dominate commerce in the real world are quick to use their leverage to control e-tailing, too.

FORBES: Not.coms

William Leichter of the e-mail security firm Tumbleweed Communications confirms that the arrest of Robert Soloway failed to control spam e-mail levels for more than a few days.

FORBES: Magazine Article