Pre-cast concrete piles are usually
A)reinforced concrete only
B)plain or reinforced concrete
C)reinforced concrete or pre-stressed concrete
D)plain, reinforced concrete or pre-stressed concrete

Question

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The Answer of Pre-cast concrete piles are usually
A)reinforced concrete only
B)plain or reinforced concrete
C)reinforced concrete or pre-stressed concrete
D)plain, reinforced concrete or pre-stressed concrete

Pre-Cast Concrete Piles Are Usually