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MIT 6.002 Circuits and Electronics, Spring 2007 19 Online
OpenStudy (anonymous):

Which of the following circuit breakers does not use pneumatic operating mechanism (A) Air blast circuit breaker (B) SF6 blast circuit breaker (C) Air break circuit breaker (D) Bulk-oil circuit breaker.

OpenStudy (anonymous):

Its D

OpenStudy (anonymous):

Thanks

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