Elevated PM10 concentrations in spring are closely related to long-rangetransport.
春季多数清洁站点PM_（10）浓度偏高与长距离输送有关；
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The products of us are suitable for manufacturing, logistics, chemical, food, warehousing and other industries, it is an ideal choice for turnover goods and long-rangetransport.
The present situation of state Monitoring and leakage diagnosis in long-rangetransport pipelines are introduced here. Some of the work we have been doing in this respect also is presented.