A definite low Pn velocity region to the south of Tarim basin is possibly related to strong magma and tectonic activity.
塔里木南缘中部存在一显著的低速区，可能与岩浆活动和构造活动较强有关。
It can make full use of favourable ignition conditions such as high temperatures in reflow region and low velocity as well as high turbulent scale.
同时利用了回流区内高温、低速、高湍流度等有利于着火的条件的新型煤粉稳燃器。
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。
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