一水箱距底面垂直向上10米处装有一块压力表,其示值是1.9Mpa,问水箱底部压力是多少?
参考答案:
P实=P表+P修
P修=10M水柱=0.1Mpa
P实=1.9+0.1=2.0MPa
Reasonable analysis as well as imagination is scientific discoveries.
A.applied to
B.appealed to
C.attempted to
D.attached to
轧辊辊头的作用是()。
A.承受压力
B.挤压轧件
C.传递扭矩