The parallel blade damper is the ZD series damper. These dampers have been designed to provide long life, silent operation and require zero maintenance.

平行叶片风门是ZD系列风门。这些风门的设计使用寿命很长，运行安静，不需要进行维护。

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His parents are Mexican immigrants who labored long days to provide a decent life for the family, Gomez said.

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After being blessed and anointed, the Khachkar is believed to possess holy powers and can provide help, protection, victory, long life, remembrance and mediation towards salvation of the soul.

UNESCO: Culture

Building on a decade-long census of marine life, these powerful tools provide quantitative baselines of biodiversity at the regional and global level.

UNESCO: OFFICE IN BRASILIA