00955cam a22002771  4500001001300000003000400013005001700017008004100034010001700075035001900092040004400111042001200155050004100167110003300208245006200241260003700303300003300340490006200373500005100435500006500486504002600551650002200577650003400599700002700633999001700660l  29000081 DLC20260227111532.0800308s1929    sz a     b    000 0 eng c  al  29000081   a(OCoLC)6062763  aLibrary, U.S. Dept. of LaborcNBuUdDLC  apremarc00aHD4813b.I4 ser. F, 2d. sect., no. 32 aInternational Labour Office.10aHydro-extractors;btheir safe construction and equipment.  aGenevab[Printed by Atar]c1929.  aviii, 102 p.billus.c24 cm.0 aStudies and reports, Series F, 2d section (Safety)vno. 3  aAt head of title: International Labour Office.  a"Prepared by Mr. Massarelli, assisted by Mr. Scotti."--Pref.  aBibliography: p. [92] 0aDrying apparatus. 0aMachineryxSafety appliances.1 aMassarelli, Francesco.  c35942d35942