The choice of installing the SCR reactor near the ground level or elevated well above ground level depends upon which configuration is viewed as most cost effective while considering installation cost and operating cost.
There is a choice in where to install an SCR reactor.
SCR reactors can only be installed near to ground level.
He looked down at the ground, while Hanson looked up.
He has been on parental leave for a few weeks.
A man at a bowling alley.
He is not very well known.
Some men play a game.
They are mushy inside.