redproducts,justastheagriculturalindustryisheavilydependentontheuseoflargefarmingmachinesforefficientproduction.Themoreefficientlywecanproduceandconvertmaterialsintousablemanufacturedproductswhileavoidingwasteandachievingthedesiredfunctionwiththeprescribedquality,thegreaterwillbeourproductivityandthebetterwillbeourstandardofliving.生活标准n.防御物;护板农业机械Thehistoryofmanhasbeenlinkedwithhisabilitytoworkwithmaterials,beginningwiththestoneageandrangingthroughthecopperandbronzeeras,theironage,andrecentlytheageofsteel,withoursophisticatedferrousandnonferrousmaterials.Wearenowenteringtheageoftailor-posites,pressorairfoilssince1945.Asthematerialsbecamemoresophisticated,havinggreaterstrengthandlighterweight,theyalsobecamemoredifficulttomanufacturewithexistingproductionmethods.binationceasestobeeconomical.
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