Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
Explanation: a hole with a drill,auger or other tools for exploring strata in search of minerals,for water supply,for blasting purposes,for proving the position of old workings,faults,and for releasing accumulations of gas or water.
a collective term for all works(weirs or diversion dams,head regulators,upstream and downstream river training works and their appurtenant structures)required at intakes of main or principal canals to divert and control river flows and to regulate water supplies into the main canal or canals