日日摸日日碰夜夜爽

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              1、Pressure unit:

              1psi=6.89KPa 1kgf/cm2=98.07KPa 1bar=100KPa
              1bar=14.5psi 1atmosphere=98.1KPa 1cm water=97.89Pa
              1mm mercury=133.3Pa 1in mercury=3.39KPa 1Torr=133.3Pa
              1ft Water=0.0298bar 1bar=33.33ft Water  

              2、Length unit:

              1in=25.4mm 1ft=0.3048m Mile=1609.3m
              1micron=10-6m    

              3、Weight unit:

              1lb=453.6g 1cwt=50.8kg 1ton(imp)=1016kg
              1ton(us)=907.2kg 1tonne=1000kg  

              4、Torque unit:

              1in-lb=0.113 N-m 1ft-lb=1.356N-m 1kg-m=9.807N-m
              1ft.poundal=0.0421N-m    

              5、Temperature unit:

              (○F-32)×5/9= ℃ K-273.15 = ℃  

              6、Area unit:

              1in2=6.45 cm2 1in2=0.093m2  

              7、Volume unit:

              1litre=0.001 m3 1cu.ft=0.0283 m3 1cu.in=16.39 cm3
              1gal(imp)=4.546 L 1gal(us)=3.79 L 1fluid oz(imp)=28.41mL
              1fluid oz(us)=29.57mL    

              8、Force unit:

              1lbf=4.45N 1kgf=9.81N 1kp(kilopond)=9.81N
              1poundal=138.3mN    

              9、Power unit:

              1lb-ft/sec=1.356W 1kg-m/sec=9.807W 1N-m/sec=1W
              1H.P(imp)=745.7W    

              10、Energy unit:

              1lb.ft=1.356 J 1N.m=1 J 1kg.m=9.807 J
              1kw.hr=3.6Mj    


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              日日摸日日碰夜夜爽
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