What type of vibrator is used for concreting thin section as well as heavily reinforced section?

What type of vibrator is used for concreting thin section as well as h

1.	What type of vibrator is used for concreting thin section as well as heavily reinforced section?
A.	Vibrating needle
B.	Internal vibrator
C.	Surface vibrator
D.	Form vibrator
Answer» E.

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What type of vibrator is used for concreting thin section as well as heavily reinforced section?

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