midoceanic rift 洋中裂谷

midoceanic rise crest 洋中隆起顶部

midoceanic ridge 洋中脊 ; 大洋中脊

midoceanic rise 洋中隆

midoceanic ridge belt 大洋中脊带

midoceanic ridge belt voice 中音域

midoceanic ridge belt rudder 中舵

midoceanic ridge belt zone draft 中区牵伸

midoceanic ridge belt point value 中点值