nominal ram pressure

例句：

1. 1. The nominal pressure of the gas is 1 atm.
   气体的名义压强为1大气压。
2. 2. The nominal force of the spring is 50 N.
   弹簧的名义力为50牛顿。
3. 3. The nominal stress on the beam is 40 MPa.
   梁的名义应力为40兆帕。