back pressure back pressure steam back-pressure steam engine back-pressure turbine back-pressure valve back radiation back rake back reaction back rest back rest roller back-river back roller back rolling back run back running back-scattered electrons back-scattering backscattering angle back shift back shock |
back pressure обратно налягане съпротивление при изтичане backpressure противонатиск противоналягане Търсената дума е намерена |