In which of the following cryogenic engines are used? (a) Frost-free refrige

In which of the following cryogenic engines are used?

(a) Frost-free refrigerators

(b) Sub-marine propulsion

(c) Rockets

(d) Researches in super conductivity

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In which of the following cryogenic engines are used? (a) Frost-free refrigerators (b) Sub-m..

Answer / guest

( c ) Rockets

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In which of the following cryogenic engines are used? (a) Frost-free refrigerators (b) Sub-m..

Answer / pritam debnath

Rockests

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