Batch tray dryers suffers from the disadvantage of

1.	Batch tray dryers suffers from the disadvantage of
A.	high maintenance cost.
B.	non-uniform & low production rate.
C.	high labour cost & low heat economy.
D.	all 'a', 'b' & 'c'.
Answer» D. all 'a', 'b' & 'c'.

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Batch tray dryers suffers from the disadvantage of

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