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Portable ladders : data sheet 665

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24510‎$a‎Portable ladders‎$b‎: data sheet 665
520  ‎$a‎This data sheet covers the selection, maintenance, and use of portable ladders used in service and manufacturing industries. No scaffolds or power-driven telescoping devices are discussed. This paper includes: selection of ladders: folding stepladders, combination or convertible ladders, straight and extension ladders, sectional ladders, trestle ladders, office and stockroom ladders, tubular metal ladders; hazards encountered when using ladders; using ladders; maintenance of ladders
65011‎$0‎MAPA20080629724‎$a‎Seguridad e higiene en el trabajo
65011‎$0‎MAPA20080599744‎$a‎Accidentes de trabajo
65011‎$0‎MAPA20080614942‎$a‎Prevención de accidentes
65011‎$0‎MAPA20080550677‎$a‎Escaleras
65011‎$0‎MAPA20080580353‎$a‎Escaleras móviles
7400 ‎$a‎National safety news
7730 ‎$t‎National safety news‎$d‎Chicago‎$g‎Vol. 116, nº 1, July 1977 ; p. 79-85