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        During the research period (Dec 2016 to Nov 2018), major trends on sales, online shipping, product and requirements data were anlysised for Engine Carbon Cleaning Machine, Hho Generator, Oxyhydrogen Generator, Carbon Clean Machine, Hho Carbon Clean Machine, Brown Gas Generator, Oxy-hydrogen Generator, Hho Carbon Cleaner, Catalytic Converter Cleaning Machine and Catalytic Converter Carbon Clean Machine etc.  And the result was as the following.
Global Market Demand trends: Between Feb 2018 and May 2018, the demand of Engine Carbon Cleaner Index slowly decrease from 984 to 944, However,The Index start to steadily increase and arrive 963 again on Nov 2018. 
Alibaba.com Sourcing trends: Long-term Engine Carbon Cleaner index consecutive growth to the top high in Nov 2018. 
Online Sales trends: Long-term Engine Carbon Cleaner index consecutive growth to the top high in Jan 2018, Finally it steadily withdrawed to 43 at Nov 2018. 
According to the trends of the three indices, The consultant suggested that the Engine Carbon Cleaner is still a product with market potential, however more attention should be paid into to improvement service and sourcing channels, anyway Alibaba.com is an important partner to expand your business.