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Canaan Inc is a developer of supercomputing chips and the manufacturer of digital blockchain computing equipment as well as the supplier of the overall scheme for computer software and hardware of digital blockchain. The revenues of the company are derived from the sales of Bitcoin mining machines and related parts.
Natural Gas Services Group Inc provides natural gas compression equipment and services to the energy industry. The company manufactures, fabricates, rents, sells, and maintains natural gas compressors and flare systems for oil and natural gas production and plant facilities. Its operating units include Rental, Sales, and Aftermarket services. The company generates the majority of its revenue by renting out low- to medium-horsepower compression equipment to natural gas production companies in unconventional oil and gas regions of the United States.