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In conclusion, the price increase of the Jack Hammer can be attributed to a combination of factors, including increased demand, rising raw material costs, transportation expenses, and supply chain disruptions. While these factors may be temporary, they have had a significant impact on the price of this popular power tool. Consumers may need to consider alternative options or wait for prices to stabilize before making a purchase.

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The hard carbon aerogel can maintain the super-elasticity in harsh conditions, such as in liquid nitrogen. Based on the fascinating mechanical properties, this hard carbon aerogel has promise in the application of stress sensors with high stability and wide detective range (50 KPa), as well as stretchable or bendable conductors. This approach holds promise to be extended to make other non-carbon based composite nanofibers and provides a promising way of transforming rigid materials into elastic or flexible materials by designing the nanofibrous microstructures.

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