Ground Gas Protection Verification Services GeoShield – Gas Membrane Testing BS 8485: 2015
This video, https://www.youtube.com/watch?v=ypqGTOVotFg, can also be seen at https://www.youtube.com/channel/UCWDLqrJIxD4KPkTPGkS7qxw.
This video, https://www.youtube.com/watch?v=ypqGTOVotFg, can also be seen at https://www.youtube.com/channel/UCWDLqrJIxD4KPkTPGkS7qxw.