4
Carbon black produced from natural gas; and synthetic gas produced from natural gas
7
Industrial chemical reactors that use a plasma arc for processing natural gas to produce carbon black and synthetic gas
35
advertising and marketing of carbon black for others
37
maintenance and servicing of carbon black production and natural gas processing plant facility to produce carbon black and synthetic gas; construction of facilities for the production of carbon black and the processing of natural gas
40
Carbon black and natural gas production services
42
engineering design and construction of facilities for the production of carbon black and the processing of natural gas
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