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Книги Книги 21 - 23 з 23 у Service blocks must be covered over their entire surface with at least two coats....
" Service blocks must be covered over their entire surface with at least two coats of waterproof paint. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or... "
Electric Lighting Specifications for the Use of Engineers and Architects - Сторінка 121
автори: Earle Abbott Merrill - 1892 - 176 стор.
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Standard Wiring for Electric Light and Power: As Adopted by the Fire ...

Harry Cooke Cushing - 1915 - 224 стор.
...waterproof (see p. 96). c. Must be at least seven feet above the highest point of flat roofs (see p. 43) and at least one foot above the ridge of pitched roofs over zvhich they pass or to which they are attached and roof structures must be substantially constructed....
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Standard Wiring for Electric Light and Power as Adopted by the Fire ...

Harry Cooke Cushing (jr.) - 1917 - 360 стор.
...waterproof, (see p. 129). c. Must be at least eight feet above the highest point of flat roofs (see p. 53) and at least one foot above the ridge of pitched roofs...over which they pass or to which they are attached and roof structures must be substantially constructed. Wherever feasible, wires crossing buildings...
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Encyclopedia of Engineering: A Treatise on Boilers, Steam Engines ..., Том 3

Calvin Franklin Swingle - 1906
...covered over their entire surface with at least two coats of waterproof paint. c. Must be at least 7 feet above the highest point of flat roofs, and at...over which they pass or to which they are attached. Roof structures are frequently found which are too low or much too light for the work, or which have...
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