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Electronics and Communication Engineering - Automatic Control Systems - Discussion

Discussion Forum : Automatic Control Systems - Section 4 (Q.No. 30)
Automatic Control Systems
30.
In a pneumatic bellows
the input surface, output surface and side walls are corrugated
the input surface and output surface are flat but the side walls are corrugated
the input surface and side walls are flat but the output surface is corrugated
the input surface and output surface are corrugated but the side walls are flat
Answer: Option
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