How about Blue Sky sales net?
2021-03-20

Nanjing Blue Sky Filter Co.,Ltd. is widely recognized for its core competitiveness in R&D and production of filter bags. Blue Sky produces a number of different product series, including liquid filter bags. Blue Sky activated carbon particle filter is required to pass physical tests conducted by third-party labs. These tests include durability testing, adhesion testing, dimension stability testing, and wear resistance testing. The design of air purification filters is compact, so it's easier to carry with.

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