This plate is growing on both sides, and since there is no intermediate trench, the two ridges must be moving apart.
这个板块是在两边生长的，由于没有中间的沟槽，两个脊必然是分开的。
2
If the cutting ring and eye wear plate is not serious, cutting ring and the eye plate spacing <0.1mm, and no more than 1mm between them in a trench scratches, water law can be used directly.
The current marginal sea and trench-arc-basin system of west Pacific is reformed by interaction of Pacific plate, Australian plate, and Eurasia plate in Cenozoic.