杭州—湖州天然气输气管道工程是西气东输工程主要支干线之一，也是浙江省的第一条天然气长输管道。
The natural gas pipeline from Hangzhou to Huzhou is a large branch of "West-to-East gas pipeline", and the first long-distance gas pipeline in Zhejiang Provice.
图3是PGX型号的内部结构简图，该过滤机是浙江省温州市东瓯微孔过滤有限公司开发出来，已获国家专利。
Figure 3 is the internal structure of PGX model, and the filter is developed by Wenzhou Dongou Micro-Filtration Ltd. Company, which has achieved the national patent.
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