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Floor buffers or rotary floor machines use rotary brushes of a soft material to clean, scrub, and polish linoleum surfaces. For marble and wood floors, floor polishers may be used to apply protective coating to the floor. [1] Floor burnisher is the term for a high speed floor buffer that rotates its pad at over 1000 RPM.
While used less extensively than traditional mechanical polishing, electropolishing is an alternative form of polishing that uses the principles of electrochemistry to remove microscopic layers of metal from a base surface. [3] This method of polishing can be fine-tuned to give a wide range of finishes, from matte to mirror-bright.
Vertical cone polisher: This machine uses a covered cone within a perforated screen to create an abrasive surface for polishing rice. [ 7 ] Horizontal polisher : This machine uses a cylinder covered in emery that is placed within another cylinder and rotated to polish the rice.
Spray (sweat) drug test kits are non-invasive. It is a simple process to collect the required specimen, no bathroom is needed, no laboratory is required for analysis, and the tests themselves are difficult to manipulate and relatively tamper-resistant. The detection window is long and can detect recent drug use within several hours.
French polishing consists of applying many thin coats of shellac dissolved in denatured alcohol using a rubbing pad lubricated with one of a variety of oils. The rubbing pad is made of absorbent cotton or wool cloth wadding inside of a piece of fabric (usually soft cotton cloth) and is commonly referred to as a fad , [ 1 ] also called a rubber ...
For a current buffer, if the current is transferred unchanged (the current gain β i is 1), the amplifier is again a unity gain buffer; this time known as a current follower because the output current follows or tracks the input current. As an example, consider a Norton source (current I A, parallel resistance R A) driving a resistor load R L.