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Floor Cleaning Echo: The continuous-re¬cording echo sounder, however, has revealed that the topography of the ocean Floor cleaning echo is quite diverse and every bit as varied as the topography of land surfaces. The major contribution of the pre¬cision continuous-recording echo sounder, in fact, is that the topography of the sea Floor cleaning echo can now be thought of in the same physiographic or geo-morphological terms as the topography of the land. The sea Floor cleaning echo has the same complex moun¬tain systems, plains, steppes, plateaus, canyons, and trenches that are seen on land, except that the ruggedness of the sea Floor cleaning echo is generally somewhat greater because of the lack of vigorous erosion over large areas of the deep-sea Floor cleaning echo.
Sounding Apparatus. The "eyes" of a deep-sea research vessel are its echo sounder, which pro¬vides knowledge of the topography of the sea Floor cleaning echo. The earliest deep-sea soundings were made with hemp rope and required that the ship be stopped for many hours, but in 1911 the U.S. engineer Reginald Fessenden developed a method of determining depth from a moving ship by measuring the time required to obtain an echo from the sea Floor cleaning echo.See Also Floor Cleaning Osition:Most industrial Floor cleaning osition involves hard-surface substrates. The operations include the Floor cleaning osition of metal parts during fabrication and before plating or painting; maintenance Floor cleaning osition of ve¬hicles; and janitorial Floor cleaning osition. The detergents used are usually high in builder content and con¬tain low-foaming surfactants of high Floor cleaning osition power. Foam is objectionable because it lowers the efficiency of most Floor cleaning osition machines.
Dry Floor cleaning osition became widespread in America by 1910. The exact date that it became estab¬lished initially is not known. In the 1920's valet shops or press shops became common in the United States. These shops sent clothing out to be cleaned. Garments were returned to the shops for finishing or pressing. This type of service has to a great extent been replaced by shops with small dry Floor cleaning osition plants. In the 1930's many laundries added dry Floor cleaning osition departments, and gradually dry Floor cleaning osition has become the predomi¬nant service.
On The Other Hand See Floor Cleaning Low:DRY Floor cleaning low, also written dryfloor cleaning low, is the process of washing fabrics with liquids other than water. Dry Floor cleaning low solvents dissolve oily and fatty substances that are not soluble in water. These solvents do not swell natural fibers as water does. Such swelling is one of the major causes of shrinkage.
History. Archaeological discoveries have re¬vealed the existence of dry Floor cleaning low in the My¬cenaean civilization (1600-1100 B.C.). Mention of dry Floor cleaning low was included on clay tablets that listed more than 100 occupations. Grease-absor¬bent earths may have been used.
Essentially the same procedures are followe in the dry Floor cleaning low of many Textile items othi than clothing, such as draperies, Table linen blankets, and small rugs. Leather garments ai dry-cleaned also, but the dry Floor cleaning low of leathf requires special skills, and most dry cleaners sen such articles to leather cleaners.
In 1959, small dry Floor cleaning low establishmenl with coin-operated machines were introducec The small complete dry Floor cleaning low units hold pounds (3.6 kg). The customer or an attendai loads and unloads the garments.
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