单词low-velocity-zone
网络: 低速度带；低速带
A low velocity zone exists at the middle of the passages near the suction side of the blade.
小流量工况始终存在一个低速区，位于叶槽进出口之间，靠近吸力侧。
The lowermost mantle layer is above the core mantle boundary (CMB) and composed of D " region and ultra-low velocity zone (ULVZ). "
地幔底层由具有高地震波速和高密度的D″区和超低速带（ULVZ）组成。
Review on studies of Ultra Low Velocity Zone
超低速区研究进展与展望