【英语翻译书名是:MechanicalEngineeringDesign(fifthedition)句子是:1.Themultipleandsubmultipleprefixesinstepsof1000onlyarerecommended.2.Whenraisingprefixedunitstoapower,itispermissible,thoughnotoftenconvenient,touse】
英语翻译
书名是:MechanicalEngineeringDesign(fifthedition)
句子是:
1.Themultipleandsubmultipleprefixesinstepsof1000onlyarerecommended.
2.Whenraisingprefixedunitstoapower,itispermissible,thoughnotoftenconvenient,tousethenonpreferredprefixessuchascm2ordm3.
3.Asageneralrule,itisbothconvenientandgoodpracticetoselectprefixes
suchthatthenumberstringswillcontainnomorethanfourdigitstothe
leftofthedecimalpoint.
Byapplyingthisrule,wefindthatsomeofthepreferredunitsarekilopoundsper
squareinch(Kpsi)andmegapascals(Mpa)forstress,poundspersquareinch(psi)and
kilopascals(kpa)forairorhydraulicpressure,pounds(lb)andkilonewtons(KN)forforce,
andinchestothefourthpowerandcentimeterstothefourth
powerforsecondmomentofarea.
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