# He has stretched out the measuring line

"It is as though he has measured the wall"

# has not withheld his hand from destroying the wall

"has used his hand to completely destroy the wall" or "has completely destroyed the wall" 

# He has made the ramparts and wall to lament; together they wasted away

"Because he has destroyed the ramparts and walls, they are like people who lament and have lost their strength"

# ramparts

These were outer protective walls to keep attackers from breaking into the city.