Many residual arcs and back arc basins exist between the frontal arc and Eurasia continent.
介于前缘弧和欧亚大陆之间的是众多的残余弧和弧后盆地。
Lincang arc and Cathaysian arc probably served as the frontal arc of Huanan archipelago, playing the similar role as Indonesian arc in Eurasia continent today.
临沧弧和华夏弧可能为华南多岛海的前缘弧，起着与今天欧亚大陆的印度尼西亚弧相类似的作用。
The radian of the arc-shaped blade can be adjusted, the frontal area and the lateral faces are provided with the knife edges, and the watermelon seeds can be removed sanitarily and conveniently.
本实用新型的弧形刀片的弧度可调且正面和侧面都有刀刃，可以卫生方便的去除西瓜瓤。
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