The characteristics of the far-field noise of impinging jet with 3-millimeter diameter axisymmetric convergent nozzle under the condition of variable nozzle-to-plate distance, and their methanism were investigated experimentally.
测量了3毫米口径轴对称收缩喷嘴射流冲击大平板产生的噪声随冲击距离变化的特性。
Under this condition, the field measuring displacement actually reflects the viscoelastic-plastic character.
在这种情况下, 工程开挖后的现场量测位移,实际上反映了围岩的粘弹塑性特性.
Overall condition is inferior to net last year, occurrence deficit of some bee field.
实际收入总体情况不如去年, 有的蜂场出现亏损.
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