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2. Cleaner - Wikipedia

   en.wikipedia.org/wiki/Cleaner

   They use cleaning equipment to clean mirrors, floors, toilets and sinks. They perform the cleaning activities before, during and after operational service hours. Toilet attendants refill the facility with supplies as needed and maintain records of their daily operations." [15] 9129 - Other cleaning workers: cleaning workers not classified [15]

3. Water turbine - Wikipedia

   en.wikipedia.org/wiki/Water_turbine

   Steel elements are repaired by welding, usually with stainless steel rods. Damaged areas are cut or ground out, then welded back up to their original or an improved profile. Old turbine runners may have a significant amount of stainless steel added this way by the end of their lifetime.

4. Piranha solution - Wikipedia

   en.wikipedia.org/wiki/Piranha_solution

   Molecular models of the different molecules active in Piranha solution: peroxysulfuric acid (H 2 SO 5) and hydrogen peroxide (H 2 O 2). Piranha solution, also known as piranha etch, is a mixture of sulfuric acid (H 2 SO 4) and hydrogen peroxide (H 2 O 2).

5. Sluice - Wikipedia

   en.wikipedia.org/wiki/Sluice

   A sluice gate. A sluice (/ s l u s / SLOOS) is a water channel containing a sluice gate, a type of lock to manage the water flow and water level. It can also be an open channel which processes material, such as a river sluice used in gold prospecting or fossicking.

6. Engineering drawing abbreviations and symbols - Wikipedia

   en.wikipedia.org/wiki/Engineering_drawing...

   Example would be the top of a coffee table to the shag of the carpet, not where the bottom of the tables feet dig in. AISI: American Iron and Steel Institute: The AISI acronym is commonly seen as a prefix to steel grades, for example, "AISI 4140". The SAE steel grade system was formerly a joint AISI-SAE system. Al or AL: aluminium: ALY: alloy ...

7. Marine grade stainless - Wikipedia

   en.wikipedia.org/wiki/Marine_grade_stainless

   SAE 316 stainless steel is a molybdenum-alloyed steel and the second most common austenitic stainless steel (after grade 304). It is the preferred steel for use in marine environments because of its greater resistance to pitting corrosion than most other grades of steel without molybdenum. [ 1 ]