n21
n21-
Over this oil measure ( N21 ) by braided stream delta plain-front deposits .
Ⅶ油组及其以上（N12）主要为辫状河三角洲平原-前缘沉积。
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The behaviors of platinum dissolution in N21 and N31 phosphate laser glass under different temperatures and oxygen bubbling conditions were investigated in this work .
研究了N21和N31二种磷酸盐激光玻璃中铂金在不同温度、不同通气条件下的溶解情况。