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mould nitrogen gas producer adopts physics to adsorb law and electrochemistry and departs the Buddhism the aspects of things and unite , and with the scarce metal catalytic agent is act as , Can directly draw the high pure nitrogen from the air. Do not need deoxidation, The purity of nitrogen can be up to 99. 999%. This instrument technological process is advanced and structure compactness is rational, Suitable for the various types of gaseous phase chromatograph and the little coulomb of appearances forms a complete set and uses.