In cement pressure grouting G.I pipes of diameter …… and ……length, should be fixed  in drilled holes
a) 12 to 20 mm, 200 mm*
b) 12 to 20 mm, 300 mm
c) 12 to 25 mm, 500 mm
d) 20 to 25 mm, 300 mm

1 Answer

Answer :

a) 12 to 20 mm, 200 mm*

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