Changes

|align="center" valign="top"| {{Icon|file=rota_sludge_well_drilling_icon.png|alt=Sludging - Asian sludge hammer|width=94|link=Sludging - Asian sludge}} <br> [[Sludging - Asian sludge]]

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{|style="height:140px; background:#efefef"

|align="center" valign="top"| {{Icon|file=rota_sludge_well_drilling_icon.png|alt=Jetting - EMAS method|width=94|link=Jetting - EMAS method}} <br> [[Jetting - EMAS method]]

|align="center" valign="top"| {{Icon|file=stone_hammer_well_drilling_icon.png|alt=Stone hammer well drilling|width=94|link=Stone hammer well drilling}} <br>[[Stone hammer well drilling|Stone hammer tube well drilling]]

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{|style="height:140px; background:#efefef"

|align="center" valign="top"| {{Icon|file=Icon_under_development.png|alt=Tube well jetting|width=94|link=Tube well jetting}} <br> [[Tube well jetting|Tube well jetting]]