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File: D:\wwwroot1\alipdf.com\app\core\DS_Controller.php
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Function: __construct
File: D:\wwwroot1\alipdf.com\app\core\DS_Controller.php
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Function: __construct
File: D:\wwwroot1\alipdf.com\app\controllers\Search.php
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Function: __construct
File: D:\wwwroot1\alipdf.com\index.php
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Function: require_once
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1石油化工苛刻工况下的调节阀选用 摘要：苛刻工况是指生产过程的操作条件为高温、高压，且易燃易爆。石化化工装置长周期运行在这种高 温、高压差以及多相流等操作条件下，极易产生大能量冲击、振动、腐蚀、磨蚀和空化气蚀以及高 噪声。普通的调节...
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