Sealing performance and operating life of the fracturing pump directly influence quality of the acidizing operation, and bad seal will result in great deal of maintenance work.

压裂泵柱塞密封性能好坏与使用寿命的长短直接影响压裂酸化作业的正常实施，密封不良将带来很大的维护工作量。

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Hydraulic system high reliability and excellent performance, easy maintenance, hydraulic components and seal famous at home and abroad, use cycle chosen long, safe and reliable operation.

液压系统可靠性高，性能优良，易于维护，液压元件及密封选用国内外名牌，使用周期长，运行安全可靠。

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This paper mainly introduces characteristics and classification, installation and use, as well as repair and maintenance of the power plants pump mechanical seal.

文章主要介绍了发电厂中泵类机械密封的特点与分类、安装与使用以及检修与维护等。

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On March 31, 2010, a Manhattan Grand Jury Indictment (originally filed under seal on February 18, 2010) was unsealed in which David Porath, a former owner of a maintenance and insulation company, was charged with engaging in a conspiracy to rig bids for NYPH contracts for re-insulation services, and for filing a false federal tax return in 2005 that substantially understated his income.

FORBES: UPDATE: Another Hospital Bid Rigging Defendant Pleads Out In NY Federal Case