Apparatus for removing material such as concrete from underwater

Base seat of pneumatic grinder

Core slabbing method

Cutting block for a sawing machine for sawing stone blocks

Guide rail for equipment for working on concrete and rock

Heater fashioned from a rock

Heater fashioned from a rock

Method and apparatus for treating a surface of granite with a hi

Method for consolidating natural stone blocks

Method for the production of slabs of marble or similar stony ma

Method of forming stone inlays in wood and article of...

Method of machine cutting silicon metal particulates with Si.sub

Method of preparing concrete column for attachment to beam

Method of working, forming and finishing single crystals

Opening method for reinforced concrete wall

Paving brick template

Process for producing non-slip floor covering

Process of forming openings