Dab tsi yog qhov zoo ntawm cov kua nitrogen
Raws li cov khoom lag luam compact, yooj yim thauj khoom, kua nitrogen tau siv rau hauv ntau qhov kev lag luam thiab kev siv rau ntau xyoo. Nws cov txiaj ntsig siv xws li cryogenics, thaub qab nitrogen, shrink-welding ntawm machinery, ntau yam kev siv cua txias, qauv pres ...
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