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Boss—30 years professional liquid nitrogen container manufacturer. Boss liquid nitrogen dewar company was founded in 1989. The first BS brand liquid nitrogen dewar (YDS-10) was born in the Boss factory.2010, The delivery capacity is more than 20000 sets per year.2011, ISO standard are applied in the production process. The delivery capacity more than 10000 sets per year.2012, New products YDZ series was born, YDZ: self-pressured liquid nitrogen cylinder. 2013, OEM services can be accep......... more