The death cause dominatingly distributed on no cardiac reasons such as pulmonary encephalopathy and respiratory failure, 94.7%(126/133) .

因肺性脑病、呼吸功能衰竭等所导致的死亡居多，占94.7%（126/133）。

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In addition, tubular membrane is dominatingly made of polyvinylidene fluoride (PVDF) with the integrated production technology and the membrane is tested with self-made leak hunting device.

另外，以聚偏氟乙烯(PVDF)为主要原料用管式膜一体化技术生产了管式膜，并通过自行设计的检漏装置对管式膜进行检测。

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