bentonite seal services
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Supra - Exploration Drilling Service
of sediment and collapse. They can be drilled more than 300 metres deep. The space around the casing must be sealed with grouting material of either neat cement or bentonite clay to prevent contamination by water draining from the surface downward around the outside of the ...
By Supra Internasional Indonesia based in Kota Bandung, INDONESIA. from Well Drilling and Groundwater Engineering Service line
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