边沟
The behavior of the subduction zone and the stress state were discussed. The earthquakes of mb ≥ 4.0 distribute mainly in an arc-like narrow belt in the west side of the Ryukyu trench and form a clear Benioff zone beneath the island arc.
m b≥4.0的地震主要分布于琉球海沟西侧的弧形带,并形成明显的Benioff带。
New Road Side Trench Digger
新型公路边沟清挖机
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