deflections挠度deflectionn.歪斜；偏向；偏转角；挠度deflection efficiency致偏效率,偏转效率deflection dispersion偏斜散布deflection anemometer偏转风速表deflection modulation偏转调制deflection constraint刚度约束deflection correction方向修正量deflection micrometer方向补助分划环deflection aberration偏转象差deflection prominence失衡突出deflection difference分火量,集火量