Author Question: All drainage pipes should be surrounded by an envelope of ____________________. Fill in the ... (Read 31 times)

WhattoUnderstand

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All drainage pipes should be surrounded by an envelope of ___________________ _.
 
  Fill in the blank(s) with correct word

Question 2

Drainage pipe is placed in the soil with the slits facing ___________________ _.
 
  Fill in the blank(s) with correct word



dudman123

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Answer to Question 1

gravel

Answer to Question 2

down



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